Exam 19: The First Law of Thermodynamics

A quantity of ideal gas requires 800 kJ to raise the temperature of the gas by 10.0 K when the gas is maintained at constant volume.The same quantity of gas requires 900 kJ to raise the temperature of the gas by 10.0 K when the gas is maintained at constant pressure.What is the adiabatic constant γ for this gas?

An ideal gas initially at 300 K and occupying a volume of 20 L is adiabatically compressed.If its final temperature is 400 K and γ = 1.30,what is its final volume?

During an adiabatic process,an ideal gas does 25 J of work.What is the change in the internal (thermal)energy of the gas during this process?

An ideal monatomic gas cools from 455.0 K to 405.0 K at constant volume as 831 J of energy is removed from it.How many moles of gas are in the sample? The ideal gas constant is R = 8.314 J/mol • K.

How much work is done by 3.00 mol of ideal gas when it triples its volume at a constant temperature of 127°C? The ideal gas constant is R = 8.314 J/mol • K.

A steel container,equipped with a piston,contains 21 mol of an ideal gas at 465 K.The container is compressed isothermally to 90% of its original volume.How much work is done on the gas? The ideal gas constant is R = 8.314 J/mol • K.

During an isothermal process,5.0 J of heat is removed from an ideal gas.What is the change in internal (thermal)energy of the gas?

When a fixed amount of ideal gas goes through an isobaric expansion,

In an isochoric process,the internal (thermal)energy of an ideal gas decreases by 50 J.How much heat is exchanged with the gas during this process?

An ideal gas in a balloon is kept in thermal equilibrium with its constant-temperature surroundings.How much work is done by the gas if the outside pressure is slowly reduced,allowing the balloon to expand to 6.0 times its original size? The balloon initially has a pressure of and a volume of The ideal gas constant is R = 8.314 J/mol • K.

When a fixed amount of ideal gas goes through an isochoric process,

A cylinder contains 23 moles of an ideal gas at a temperature of 300 K.The gas is compressed at constant pressure until the final volume equals 0.43 times the initial volume.The molar heat capacity at constant volume of the gas is 24.0 J/mol • K and the ideal gas constant is R = 8.314 J/mol • K.The heat absorbed by the gas is closest to