Gaseous and liquid states Questions and Answers

The density of sodium chloride is 2 164 g cm X Incorrect What is the molar concentration of NaCl in a 10 8 cm sample of pure NaCl molar concentration 0 4295 M Hint Assistance Usec

If 110 1 mL of water is shaken with oxygen gas at 1 9 atm it will dissolve 0 0048 g O Estimate the Henry s law constant for the oxygen gas in water in units of g mL atm KH i g mL atm

In a certain container at 156 C the concentration of water vapor is 0 0313 M What is the partial pressure of H O in the container P H O i atm

Describe how gases act according the Kinetic Theory of Gases

We keep the drying oven at 105 C to evaporate water from the wet sand You heat the evaporating dish over a Bunsen burner with a flame temperature of 900 1200 C to evaporate water from the dissolved salt Contact with water at 68 C can produce a serious scald in one second Describe the precautions you should take to avoid burning yourself in today s experiment

If 22 2 g of water were vaporized how much volume would it occupy

a The temperature inside a pressure cooker is 112 C Calculate the vapor pressure of water inside the pressure cooker The enthalpy of vaporization of water is 40 7 kJ mol Vapor pressure atm b What would be the temperature inside the pressure cooker if the vapor pressure of water was 2 80 atm The enthalpy of vaporization of water is 40 7 kJ mol Temperature C

Scoring Your score will be based on the number of correct matches minus the number of incorrect matches There is no penalty for missing match Consider the following vapor pressure versus temperature plot for three different substances A B and C Prap torr ABC A Temperature C If the three substances are PH3 AsH3 and H O match each curve to the correct substance AsH3 Clear All

A 11 4 g sample of ice at 10 6 C is mixed with 115 1 g of water at 80 0 C Calculate the final temperature of the mixture assuming no heat loss to the surroundings The heat capacities of H O s and H O l are 2 03 J g C and 4 18 J g C respectively and the enthalpy of fusion for ice is 6 02 kJ mol Temperature PC Submit Answer Try Another Version 5 item attempts remaining

water d 1 00 g mL mercury d 13 6 g mL Indicate on the above diagram where each of the following would come to rest after being dropped into the glass cylinder a a glass marble d 2 95 g cm c a lump of coal d 0 83 g cm b a platinum ring d 21 45 g cm d a champagne cork d 0 19 g cm A 250 mL flask and stopper have a mass of 110 525 g A 50 0 mL sample of gasoline is h floak ng a total mass of 146 770 g Find the density of the gasoline

What phase transition is occurring between points D and E on the heating curve O melting O freezing O vaporization O deposition Temperature M 11 D Heat added 1

A 1 20 L weather balloon on the ground has a temperature of 25 0 C and is at atmospheric pressure 1 00 atm When it rises to an elevation where the pressure is 0 720 atm then the new volume is 1 80 L What is the temperature in C of the air at this elevation

IA Review Ideal Gas Law Combined Gas Law On the MC section of the IA you will not be able to use a calculator Challenge yourself to answer these questions without one Show all work in the box to the right 1 A 2 00 gram sample of helium at STP will occupy a 11 2 L b 22 4 L c 33 6 L d 44 8 L 2 A sample of oxygen gas 0 is held in a flexible 2 0 Work L container at 300 K with a pressure of 1 5 atm The container is pushed in until the container has a volume of 1 0 L The temperature remains at 300 K What is the new pressure a 0 5 atm b 1 0 atm c 3 0 atm d 4 5 atm 3 Determine the number of moles of oxygen gas described in question 2 To simplify your calculations approximate the R value to be 0 10 L atm mol K A 0 1 mol O B 0 3 mol O C 1 0 mol 0 D 3 0 mol 0 Work Reminder STP is standard temperature 273 K and pressure 1 atm At STP 1 mole of any gas occupies 22 4 L of volume TEACHER Work

Calculate the heat produced in kJ when 224gm of CaO is completely converted to CaCO3 by reaction with CO at 27 C in a container of fixed volume 2 O 3 Given AH CaCO s AH Cao s AH CO 9 A Use R 8 3 K 1 394 kJ mol s 635kJ mol 1207kJ mol mol 1 702 04 kJ Correct Answer

18 Fill in the blank The higher the intermolecular forces the the boiling point 19 True or False The IMF with the highest boiling points will have hydrogen bonding 20 Rank these substances from highest boiling point to lowest HCI CH H 0 NaCL Why did you choose this order the melting point and the

on thinks about ways he could increase the rate of the chemical eaction between calcium chloride CaCl and sodium bicarbonate NaHCO3 Which change would MOST LIKELY increase the rate of the memical reaction art B an A at 25 B C D use a sodium bicarbonate water solution that has a temperature of 30 C instead of 25 C hich statement BEST explains why this change would increase the use 5 grams of calcium chloride powder instelld of 10 grams use slow stirring instead of rapid stirring use a 1000 mL beaker instead of a 500 mL beaker C D Part B Which statement BEST explains why this change would increase the rate of the chemical reaction A B C use slow stirring instead of rapid stirring use a 1000 mL beaker instead of a 500 ml beaker D Molecular collisions would occur more often and with more energy Reactant and product molecules would be ckber together Product molecules would have more energy and become a gas Fewer molecular collisions would be needed to form the same amount of product

Determine Pxe in a container that has the following gases and respective pressures Pressure kPa Gas Xenon Helium Nitrogen dioxide TOTAL 77 3 52 0 248 8

Question 2 Determine the molarity of a solution with a volume of 435 mL and 0 550 mol of solute dissolved Answer Question 3 M Adding or removing water will change the concentration of a solution

2 0 mol of nitrogen gas at STP occupies what volume 44 8 L O 44 8 mol 44 8 mol L O 11 2 mol 11 2 L 11 2 mol L

A chemistry student reacted magnesium metal Mg and acetic acid in varying concentrations and temperatures The following data shows their results TrialAmount of Mg g Concentration of Acid Starting Temperature of Acid Time for Mg to React min Very Low 5 min Low 4 min Medium 3 min High 2 min 1 2 3 4 5 grams 5 grams 5 grams 5 grams 24 C 24 C 24 24 C Explain how the data from the table above supports the theory that connects molecular collisions to the time for the Mg to completely react In other words how does this data support Kinetic Molecular Theory and methods to increase the rate of reaction

22 What is the difference between London Dispersion forces and Dipole Dipole forces 23 Explain why ethanol C2H5OH has a higher boiling point 78 4 C than methanol CH3OH 64 7 C

A B Observe the balloons A and B above Both balloons have a temperature of 25 0 C contain 0 50 moles of gas sealed by the knot at the bottom and have a volume of 2 2 L If balloon A is placed in a freezer with a temperature of 5 50 C which of the following statements regarding the volumes of the balloons is accurate O The balloons will remain unchanged and have equal volume at 2 2L O Balloon A will be smaller due to fewer moles of gas in the balloon O Balloon A will be larger due to lower pressure inside the freezer Balloon A will be smaller due to the gas particles moving slower 11 12 13 14 15 16 Jhy 17 18 19 20 M

At 25 C the vapor pressure in equilibrium with a solution containing CS and CH3CN solvent has a total pressure of 263 mmHg The mole fraction of CS in vapor is 0 855 What is the mole fraction of CS in the solution At 25 C the vapor pressure of CS is 375 mmHg

Clker Free Vector Images from Pixabay https pixabay com vectors balloon birthday balloon 25734 It s 32 F 0 C outside under normal atmospheric conditions 1 atm at a stunt performer s birthday party There is a huge blue balloon filled with flammable hydrogen H molar mass 2 02 g mol gas that she plans to safely ignite causing a massive explosion Inside the balloon is 267 g of H g What is the volume of the balloon in liters Round to the nearest whole number

131 0 g of chlorine gas Cl and 35 0 g of helium He are mixed in a container with a total pressure of 1 859 mmHg Determine the partial pressure of helium gas Answer mmHg

Charles Lew Worksheet 1 Directions Read each of the following questions Perform the necessary calculations SHOWING ALL WORK TO RECEIVE CREDIT FOR THE ANSWER No work no credit no kidding Remember units and significant figures where appropriate LA sample of nitrogen occupies a volume of 250 mL at 25 C What volume will it occupy at 95 0 2 Ongen gas is at a temperature of 40 0 C when it occupies o volume of 2 30 liters To what temperature should it be raised to occupy a volume of 6 50 liters 3 Hydrogen gas was cooled from 150 C to 50 C Its new volume is 75 mL What is its original volume Chlorine gas occupies a volume of 25 ml at 300 K What volume will occupy at 600 X 7 Helium occupies a volume of 3 8 liters at 45 C What volume will it occupy at 45 C 8 A sample of argon gas is cooled and its volume went from 380 mL to 250 ml If its final temperature was 55 C what is its original temperature 9 What would happen to the size of a balloon if it is taken from inside a cool air conditioned house to outside in the hot summer sun Explain making sure to identify the gas law involved as well as the variables involved

If the pressure of a gas is increased from 150 kPa to 350 kPa at constant temperatures what will the volume be in liters if it started at 1 0 L

Boyle s Law Worksheet 1 Distions Read each of the following questions Perform the necessary TO RECEIVE CREDIT FOR THE ANSWER No work no credit no kidding Remember units and significant figures where appropriate HOWING ALL WORK 1 A sample of oxygen gas occupies a volume of 250 ml at 740 torr pressure What volume will it occupy at 300 ter pressure 2 A sample of carbon dioxide occupies a volume of 3 50 liters at 125 kPa pressure What pressure would the gas curt if the volume was decreased to 2 00 liters 3 A 20 liter container of nitrogen had a pressure of 32 atm What volume would be necessary to decrease the pressure to 1 00 atm 4 Ammonia gas occupies a volume of 450 ml at a pressure of 720 mm Hg What volume will it occupy at standard pressure 5 A 175 ml sample of neon had its pressure changed from 75 kPa to 150 kPa What is its new volume 6 A sample of hydrogen at 15 atm had its pressure decreased to 0 50 atm producing a new volume of 750 ml What is its original volume 7 Chlorine gas occupies a volume of 12 liters at 720 torr pressure What volume will it occupy at 1 00 atm pressure 8 Fluorine gas exerts a pressure of 900 torr When the pressure is changed to 1 50 atm its volume is 250 ml What is the original volume

In a hot air balloon the flame is turned down What is the result the volume decreases the density increases the temperature decreases the pressure decreases

If a student has 24 6 L of oxygen gas at 2 5 atm what is the pressure if the volume compressed to 18 7 L7 A 1 18 atm 08 3 29 atm O c 1 90 atm OD 184 atm

The is the temperature and pressure at which a substance can exist in all three states of matter at once

Which of the following is not a physical change O Sublimation of CO O Vaporization of water Frost deposition on a cold window Carbon reacting with oxygen to form CO

At temperatures below 32 F water forms ice This observation is best described as O macroscopic O symbolic Omicroscopic both macroscopic and microscopic

If the density of an ideal gas at STP is found to be 1 43 g L what is its molar mass molar mass g mol

10 The more kinetic energy there is in a sample of matter the more energy is absorbed as heat more energy is given off as heat A B C lower the temperature D higher the temperature 11 What is the pH of a solution with a hydrogen ion concentration of 1 3 x 10 112 A 11 1 10 9 B C 1 3 D 0 11

e F 18 B emission 5 62 Write the balanced nuclear equation for each of the following 5 1 5 2 a potassium 40 8 decay b sulfur 35 decay c platinum 190 a decay d Ra 210 a decay e In 113m y emission

3 Book L60 1 Use the Kinetic Theory of Gasses to explain why increasing the gas volume decreases the gas pressure 1 Point Increasing the gas volume causes the ga molecules to move more quickly Increasing the gas volume causes the ga molecules to hit the side of the container less often Increasing the gas volume causes the ga molecules move more slowly Increasing the gas volume causes the ga molecules to hit the side of the container more often

A person reacts 2 61L of oxygen gas 0 at 3 58atm of pressure at a temperature of 13 42 C with 66 82g of aluminum metal according to the reaction below What mass in grams of aluminum oxide Al2O3 will form Reaction 4Al s 302 g 2Al2O3 s

M 34 5 5 42 2 points Which of the following would not affect the volume of a gas The size of the container in which the gas is stored The number of moles of the gas The molar mass of the gas The temperature of the gas Previous

Gas Stoichiometry Practice EQ How can we know about something that we cannot see What sets gases apart Where do atoms go How do the gas laws explain the natural world Enduring Understanding All matter is made of tiny moving particles and because of these particles matter behaves in predictable ways The relationships between temperature pressure volume and amount of gases enable life to survive and flourish Even though gases cannot be seen their impact on the natural world is vital Science is a process Learning Targets Convert between Celsius and Kelvin temperature scales K C4273 Explain and calculate the volume and or miles using the relationship of Avogadrd s Law Solve problems using the idead Gas Law PVT Write volume ratios using the coefficients from a balanced chemical equation Volume of A Volume of Use the ideal gas law and gas stoichiometry to solve the following molsA Vol B Vol A Vel B grams Amols A Vols TEKS ZB Plan and implement investigative procedures including asking questions formidating a testable hypothesis BG Preform stoichiometric calculations including the determination of mass and gas volume relationships between reactants and products and percent yield 9A Describe and calculate the relations between volume pressure number of moles and temperature of an ideal gas as described by Boyle s Law Charles Law Avogadro s Law Dalton s Law of partial pressure and the ideal gas law Directions Solve the following problems Be sure to show all work for full credit For the following problems assume the reactions are taking place at a pressure of 1 0 atm and a temperature of 298 K Calcium carbonate decomposes at high temperatures to form carbon dioxide and calcium oxide CaCO CO 4 Cao 1 How many liters of calcium carbonate will decompose to form 3 45 liters of carbon dioxide 2 How many liters of calcium oxide will be formed from 9 6 liters of CaCO Ethylene burns in oxygen to form carbon dioxide and water vapor C H 30 2 CO2 2H O 3 How many liters of water can be formed if 1 25 liters of ethylene are consumed in this reaction How many liters of carbon dioxide will be produced from 3 1 liters of oxygen gas

16 2 points At constant T and V if the number of moles of a gas is increased then P will remain unchanged decrease increase Previous

1 2 63 64 65 60 2 points A helium filled balloon has a volume of 2 3 L a temperature of 25 C and a pressure of 17 3 psi How many grams of helium does the balloon contain 6 5 g 0 44 g 5 2 g 0 11g Previous

is placed into the water they reach a temperature of 55 7 C What is the initial temperature in Celsius C of the metal when it was heated specific heat of water is 4 184 J g C must show all the calculations Edit View Insert Format Tools 12pt Paragraph Table BTUA 2 TU 13

The amount of gas and the pressure are constants If you increase the temperature of a gas container how does it impact the volume of gas O The volume will decrease if temperature increase O The volume will increase if the temperature increase O no change in volume with increase or decrease Temperature O it is hard to say Question 31 Dalton s Law states that the total pressure exerted by a mixture of gases is equal to the sum of the partial O True

2 An aerosol spray can with a volume of 250 mL contains 2 30 g of propane gas C3H8 as a propellant a If the can is at what is the pressure in the can b What volume would the propane occupy at STP c The can s label says that exposure to temperatures above may cause the can to burst What is the pressure in the can at this temperature

3 2 60 2 points A helium filled balloon has a volume of 2 3 L a temperature of 25 C and a pressure of 17 3 psi How many grams of helium does the balloon contain 6 5 g 0 44 g 5 2 g 0 11g O O O O Previous

31 2 points Which of the following molecules only have a temporary dipole N 0 NO NO N Previous

11 2 points The volume of a gas does not depend on the identity of the gas True False

24 2 points What is the solvent in liquid drain cleaner a solution consisting of 55 sodium hydroxide and 45 water Sodium hydroxide O Drain cleaner Water

17 2 points The volume and moles of a gas are sometimes directly inversely proportional