1 ) A monatomic ideal gas at 27° C undergoes a constant pressure process from A

Question

1 ) A monatomic ideal gas at 27° C undergoes a constant pressure process from A to B and a constant volume process from B to C. Find the total work done during these two processes. (Let V1 = 3.60 L and and P1 = 4.60 atm.) unit in j

2 ) A monatomic ideal gas at 27° C undergoes a constant volume process from A to B and a constant pressure process from B to C as diagrammed in the figure below, for which each interval on the horizontal (V) and vertical axes (P) are respectively given by 5 L and 6 atm. Find the total work done during these two processes. unit in j

3 ) An ice cube at 0.0° C is slowly melting. What is the change in the ice cube's entropy for each 1.00 g of ice that melts? unit in j/k

Explanation / Answer

(3) Mass of ice cube is m = 1.00 g                                    = 1.00 x 10-3 kg Temp of ice cube is T = 0oC                                    = 0 + 273                                    = 273 K Latent heat of fusion of ice is L = 334 x 103 J/kg The amount of heat required to melt ice is                 dQ = mL                       = (1.00 x 10-3 kg)(334 x 103 J/kg)                        = 334 J Then the change in ice cube's entropy is             dS = dQ / T                  = (334 J) / (273 K)                  = 1.22 J/K According to the CRAMSTER's policy one question should be answered per each post. So please ask the remaining questions as separate.

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