Thermodynamics Questions and Answers

In conduction, what happens to the heat transfer per unit
Physics
Thermodynamics Solutions
In conduction, what happens to the heat transfer per unit time when the thermal conductivity decreases? (A) The heat flow will increase. (B) The heat flow will remain constant. (C)The heat flow will
A steam power plant receives heat from a furnace at a rate
Physics
Thermodynamics Solutions
A steam power plant receives heat from a furnace at a rate of 280 GJ/h. Heat losses to the surrounding air from the steam as it passes through the pipes and other components are estimated to be about
Air enters an adiabatic nozzle steadily at 300 kPa, 200°C,
Physics
Thermodynamics Solutions
Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 45 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 110 cm². The gas constant of air is 0.287 kPa.m³/kg.K. The
You drop an ice cube into an insulated container full of
Physics
Thermodynamics Solutions
You drop an ice cube into an insulated container full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 60.0 g and a temperature of 0°C. The water (before the
A 10 cm thick piston sits inside a cylinder containing 0.1
Physics
Thermodynamics Solutions
A 10 cm thick piston sits inside a cylinder containing 0.1 kg of water. An internal flange is built into the cylinder and serves to stop the control volume from expanding. The mixture is expanded from
According to Newton's Law of Cooling, if a body with
Physics
Thermodynamics Solutions
According to Newton's Law of Cooling, if a body with temperature T₁ is placed in surroundings with temperature To. different from that of T₁, the body will either cool or warm to temperature T(t)
A dead body was found within a closed room of a house where
Physics
Thermodynamics Solutions
A dead body was found within a closed room of a house where the temperature was a constant 70° F. At the time of discovery the core temperature of the body was determined to be 85° F. One hour later a
P-V diagram of an ideal diatomic gas is a straight line
Physics
Thermodynamics Solutions
P-V diagram of an ideal diatomic gas is a straight line passing through origin. The molar heat capacity of the ideal gas in the process is n times the molar heat capacity of gas at the constant
A gas inside a piston-cylinder assembly undergoes a
Physics
Thermodynamics Solutions
A gas inside a piston-cylinder assembly undergoes a refrigeration cycle consisting of these three processes: Process 1-2: Compression with pV = constant from p₁ = 1 bar, V₁ = 1 m³, to p₂ = 10 bar, V₂
Air with a temperature of 27 °C receives heat at constant
Physics
Thermodynamics Solutions
Air with a temperature of 27 °C receives heat at constant volume until the temperature reaches 927°C. The specific heat of air varies with temperature as Cp = 0.9167 + (2.577 x 10^-4) (3.974 x 10^-8)
Explain the energy flow in a heat engine with a neat
Physics
Thermodynamics Solutions
Explain the energy flow in a heat engine with a neat labelled diagram and define the thermal efficiency of a heat engine
2 moles of an ideal gas is taken through a process for which
Physics
Thermodynamics Solutions
2 moles of an ideal gas is taken through a process for which the variation of internal energy (U) is shown in the figure. Temperature at points A and Care 500 K and 300 K respectively. Work done by