Worksheet: Entropy Change in a Thermodynamic Process

Fifty grams of water at are changed into vapor at . What is the change in entropy of the water in this process?

joules of heat is removed from a heat reservoir at a temperature of K. What is the entropy change of the reservoir?

A system consisting of 20.0 mol of a monoatomic ideal gas is cooled at constant pressure from a volume of 50.0 L to a volume of 10.0 L. The initial temperature of the gas was 300 K. What is the change in entropy of the gas?

An ideal gas at a temperature of K is compressed isothermally to a volume that is 0.20 times its initial volume. Determine the entropy change per mole of the gas.

A copper rod of cross-sectional area 5.0 cm² and length 5.0 m conducts heat from a heat reservoir at 373 K to one at 273 K. What is the time rate of change of the universe’s entropy for this process? Use a value of 385 W/m⋅K for the thermal conductivity of copper.

A piece of aluminum of mass 0.50 kg is at a temperature of . The aluminum is dropped into a 1.0 kg mass of water that is at a temperature of . After equilibrium is reached, what is the net entropy change of the system? Use a value of as the specific heat capacity of water and a value of as the specific heat capacity of aluminum.