Answer to Question #58127 in Molecular Physics | Thermodynamics for Christbeauty

Question

13 A 0.5kg piece of metal (c = 600/kgK) at 300 degree celcius is dumped into a large pool of water at 20 degrees celcius. Assuming the change in temperature of water to be negligible, calculate the overall change in entropy for the system
85.5J/K
67.4J/K
122.3J/K
202.3J/K

14 Calculate how much heat is needed to be supplied to a gas at a pressure of
1.25×105Pa
, such that the pressure increases by 25 per cent at constant volume, and the internal energy by 120J.
240J
120J
320J
480J