Thermodynamics: Entropy Changes - Prob 3.18, 3.20 in Physical Chemistry (3E) - Laidler/Meiser скачать в хорошем качестве

Thermodynamics: Entropy Changes - Prob 3.18, 3.20 in Physical Chemistry (3E) - Laidler/Meiser

Physical Chemistry (3rd Edition) - Keith J. Laidler and John H. Meiser Chapter 3: The Second and Third Laws of Thermodynamics Entropy Changes Prob 3.18: Initially 5 mol of an ideal gas, with C_V,m = 12.5 J/K mol, are at a volume of 5 dm^3 and a temperature of 300 K. If the gas is heated to 373 K and the volume changed to 10 dm^3, what is the entropy change? Prob 3.20: At 0°C 20 g of ice added to 50 g of water at 30°C in a vessel that has a water equivalent of 20 g. Calculate the entropy changes in the system and in the surroundings. The heat of fusion of ice at 0°C is 6.02 kJ/mol, and the specific heat capacities of water and ice may be taken as constant at 4.184 and 2.094 J/K g, respectively, and independent of temperature.