Gaseous and liquid states Questions and Answers

What is the volume when 0 980 moles of ideal gas are held at 7 33 atm of pressure and 77 7 C Please report volume in liters and to 3 significant figures Answer Time left 1 28 24 An ideal gas sample is held at a constant temperature of 18 7 C When the volume of the sample is 8 19 L the pressure is 1 76 atm What is the pressure when the sample is compressed to 1 22 L Please report pressure in atmospheres to 3 significant figures Answer

Exercise F Ideal Gas Law Using the ideal gas law PV nRT calculate the parameter that is missing in each row of the following table Enter the appropriate form of the ideal gas law in the first column as shown in the table Be sure the enter the appropriate units for each result and use the appropriate when calculating the result In the last column put the appropriate value of R for that you used The two possible values for R are given below R 0 0821 L x atm Mole x K or R 62 4 L x mm Hg Mole x K Equation V P T P nRT V 28 4 L 8 0 L 500 mL 18 L 3 15 atm or 2400 mm Hg 900 mm Hg 40 atm n 4 moles 6 00 moles 4 0 mole 273 K 300 C 450 K R Either

Which of the following processes requires the most energy input Select one O a melting 1 mole of CO2 s O b condensing 1 mole of CO2 g O c freezing 1 mole of CO2 1 O d evaporating 1 mole of CO2 1 Jiri of temperatu

3 4 points When a sample of gas with a volume of 638 7 mL and a pressure of 0 968 atm was heated from 17 99 C to 45 84 C its volume become mL What was its final pressure in atm Keep the answer with 2 decimal places Do not write unit in answer 0 97

Calculate the volume in L occupied by 0 766 mol of nitrogen gas at a pressure of 1 06 atm and a temperature of 311 70 K Keep the answer with 2 decimal places

pressure Use the editor to format your answer Question 3 Identify which of these gases exhibit non ideal gas behavior Gas A Gas B n P constarit Temperature 3 n T constant 1 Point

Given the balanced chemical equation 4Fe s 302 g 2Fe O3 s When 14 56 g of O react with excess Fe and this is the only reaction which occurs theoretically how many grams of Fe2O3 should be produced Keep the answer with 2 decimal places Do not write unit in answer

23 4 points How many liters of pure oxygen gas measured at STP are required for the complete reaction with 4 83 L of C4H10 9 also measured at STI 2 C4H10 g 13 O g 8 CO2 g 10 H O g Keep the answer with 2 decimal places Do not write unit in answer

5 1 point Will a balloon filled with C H6 sink or float in air O float sink Previous

a The solubility of gases is based on the following equilibrium Gas solvent saturated solution Is heat usually released or absorbed when a gas dissolves in a liquid O released O absorbed

3 If a gas has a volume of 5 0 mL at 100 atm what is the pressure of the gas when the volume is reduced to 3 0 mL

1 0 L of gas with a pressure of 40 atm increases to 4 0 L What is the final pressure of the gas temperature and moles stay constant O 160 atm 10 atm 0 1 atm 1 2 atm

4 pts A cyclopropane oxygen mixture is used as an anesthetic If the partial pressure of cyclopropane in the mixture is 330 mmHg and the total pressure is 1090 mmHg what is the partial pressure of the oxygen O 1420 mmHg O 330 mmHg O 1090 mmHg O 760 mmHg O 860 mmHg

Suppose you prepared a sample of nitrogen and collected it over water at 25 C at a total pressure of 739 torr and a volume of 151 r Find the partial pressure of the nitrogen in torr PN i torr Find the volume in mL it would occupy at STP

A sample of oxygen gas collected at a pressure of 0 705 atm and a temperature of 28 0 C is found to occupy a volume of 22 3 liters How many noles of O gas are in the sample mol

A 0 105 mol sample of xenon gas has a volume of 819 milliliters at a pressure of 4 93 atr The temperature of the Xe gas sample on the Celsius scale is C

at volume will 2 0 moles of N occupy at 720 torr and 20

What will be the pressure in mmHg for a sample of gas which occupies 2 50L at 25 0 C and 760 0 mmHg if it is brought to 55 0 C in a 3 25L container Enter your answer in mmHg rounded to the nearest whole number do not include units

3 An ideal gas sample containing 2 0 moles at 25 C exerts a pressure of 1 25 atm Some gas is added to the same container and the temperature increases to 75 C If the pressure also increases to 2 5 atm how many moles of gas were added to the container Assume a constant volume container

The volume of 0 741 moles of an ideal gas at 695 torr and 22 2 C is L Write your answer as 12 3 L Question 2 Not yet answered Points out of 1 00 P Flag question A sample of an ideal gas is held in a 3 35 L container of fixed volume at 28 8 C and 423 torr This sample is heated to 188 9 C The pressure of the gas at this new temperature is torr

1 How many Joules of heat energy are required to raise the temperature of 100 0 g of aluminum by 120 0 C The specific heat of aluminum is 0 897 J g C 2 A sample of an unknown substance has a mass of 120 0 grams As the substance cools from 90 0 C to 80 0 C it released 963 6 J of energy a What is the specific heat of the sample b Identify the substance among those liseted in the table below Substance Specific Heat Water liquid 4 184 J g C Water ice 2 03 J g C Water steam 2 01 J g C 2 44 J g C 0 897 J g C 0 803 J g C Ethanol Aluminum Granite

fa container with a movable piston initially has a volume of 26 mL and a temperature of 362 K what temperature was the gas increased to if the vo expanded to 38 mL

Between two samples of helium and neon at the same temperature which if any has the highest average kinetic energy and which if any has the highest average speed

Which of the following processes releases the most energy Select one O a condensing 1 mole of CO2 g O b melting 1 mole of CO2 s O c evaporating 1 mole of CO 1 O d freezing 1 mole of CO2 0

PV nRT A 4 8 L B 9 5 L C 25 L D 50 L ogen gas occupy at 2 0 atm of pressure and at 65 C R 0 0821 L atm mol K 50 F

An ideal gas sample occupies a fixed volume of 7 95 L At 59 3 C the pressure is 2 95 atm What is the pressure when the sample is cooled to 10 4 C Please report pressure in atmospheres to 3 significant figures

For the reaction 2PCI 1 O2 g 20PCI g AH 508 kJ mol and AS 178 J mol K at 298 K What is AG for this reaction AG AH TAS K

While the ideal gas law provides a useful approximation real gases do deviate from ideal behavior This is because Select one O a real gasses experience intermolecular forces of attraction O b real gasses are composed of atoms that occupy some volume c real gasses have no mass O d more than one of these

A gas mixture is prepared containing 0 415 moles of helium and 0 631 moles of argon This mixture is placed in a 4 33 L container at 28 2 C What is the total pressure under these conditions Please report the pressure in atmospheres to 3 significant figures

19 2 points Specific heat of a substance is the quantity of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius True False Sevious

1 point The solubility of a compound defined as the maximum concentration of a substance that can be achieved under specified conditions True False

What volume in liters does 0 138 g of O occupy at 26 9 C and 746 torr Assume the standard atmospheric pressure ea 760 torr

5 If 10 0 gram of aluminum chloride are decomposed how many molecules of Cl2 are produced Cl2 AICI 3 AI

A sample of an unknown compound is vaporized at 200 C The gas produced has a volume of 1100 mL at a pressure of 1 00 atm and it weighs 0 908 g Assuming the gas behaves as an ideal gas under these conditions calculate the molar mass of the compound Round your answer to 3 significant digits A g mol X C

A gas cylinder has a volume of 2 50 L The pressure inside the cylinder is 100 atm at a temperature of 293 K When the piston is withdrawn to expand the cylinder volume to 50 0 L the pressure falls to 2 00 atm What would be the new temperature in K Helpful formula PV T 733 K PAPE 293 K 117 K 393 K P2V2 T

What is the volume of a 2 3 mole gas at STP The gas constant R is 0 0821 Helpful equation P Vn R T 2 3 L 22 4 L 51 6 L atm L mol K

2 1 point Given a fixed amount of gas its volume is directly proportional to its pressure at constant temperature True False

Quantum Numbers and Electron Configuration What is the atom described by Ar 4s 3d 0 4p

mixture of He and Ne need to be separated What will be the ratio of the rates of effusion of He and Ne The ratio of the rates of effusion of He to Ne i

How much heat is needed to melt 10 0 grams of ice at 10 C until it is water at 10 C O 83 6 J O 3963 J 83 6 J 0 3963 J

Question 4 When 0 246 LN at 2 66 atm and 234 C is mixed with 0 790 L N at 718 93 torr and 125 C in a 437 203 mL flask at 38 C what is the pressure in the flask Type your answer here Push me to continue atm Gas Law

2 If the mass of a liquid is 23 13g and its volume is 35 0mL what is its densit CAC

D 2 points If an electron travels at a velocity of 4 4 x 107 m s and has a mass of 9 109 x 10 28 g 1 kg 1000 g What is its wavelength in m Given Planck s constant is 6 626 103 J s Answer in scientific notation Example 1 23 x 10 4 1 23 10 4 Type your answer

D 2 points An object has a density of 6 30 g mL and a volume of 33 8 mL What is the mass in g of the object Answer to 1 decimal place Type your answer

Methane is formed in landfills by the action of certain bacteria on buried organic matter If a sample of methane collected fr a landfill has a volume of 500 mL at 742 torr and 22 7 C how many grams of methane are in the sample methane

1 1 point Determine the root mean square velocity in m s of a gas that has molar mass of 108 8 g mol at 74 7 C Given R 8 314 J K me Answer in integer Tyne your answer

14 3 Why will two oils dissolve in each other but not in water Explain

Which of the following IS a part of the Kinetic Molecular Theory KMT Molecules in a gas move rapidly Molecules have predictable motions Molecules in a gas move slowly Molecules have HUGE volumes

How much heat is released if a 10 0 gram piece of aluminum is cooled from 70 C to 50 C O 200 J O 200 J O 180 J O 180 J

If the temperature of a gas is increased from 20 C to 35 C what is the new pressure if the original pressure was 1 2 atm Assume that volume is constant 2 6 atm 1 3 atm 1 0 atm 0 6 atm