(1) - When a system changes from an equilibrium state A to another equilibrium state B, choose the correct statement for each of the quantities (i – iii): (i) Heat; (ii) Entropy; (iii) Work done by the system. Statements: " (a) "It's a quantity that is determined uniquely for states A and B.' (b) "It's a quantity that is determined by the change between states A and B, and also by specifying how the system changed from A to B."

9:EAI OEO"llzain IQ نقطنان )2( Initially 5 mol of an ideal gas, with CV,m = 12.5 J K-1 mol-1, are at a volume of 5 dm3 and a temperature of 300 K. If the gas is heated to 373 K and the volume changed to 10 dm3, what is the entropy change 42.4 J.mol-1.K-1 24.4 J.K-1 O 24.4 J.mol-1.K-1 42.4 J.K-1 (O öslg äbäi Predict which of the following substances has the highest entropy value at 25°C Mgo (s) O Снзон (1) со (д) CaCO3 H20 (I)

A heat engine that operates between two heat reservoirs at 900 ° C and 0 ° C, respectively, it has an efficiency of 35% and receives 21 kJ. If the tank temperature low is the environment, determine its entropy variation. a) -50 J / K b) 296.7 J / K c) 50 J / K d) ∞

53. What is the decrease in entropy of 25.0 g of water that condenses on a bathroom mirror at a temperature of 35.0° C, assuming no change in temperature and given the latent heat of vaporization to be 2450 kJ/kg?