In the process of taking a gas from state a to state c along the curved path sho

Question

In the process of taking a gas from state a to state c along the curved path shown in the figure (Figure 1) , 85 of heat leaves the system and 54 of work is done on the system. Part A: Determine the change in internal energy Ua-Uc. Part B: When the gas is taken along the path cda, the work done by the gas is W=34J . How much heat Q is added to the gas in the process cda? Part C: If Pa=2.1 Pd, how much work is done by the gas in the process abc? Part D: What is Q for path abc? Part E: If Ua-Ub =15 J, what is Q for the process bc?

Explanation / Answer

Sign Convention used : Work done by system -> +ve Heat given to system -> +ve Q = -85, W = 54 U = Q - W = -139 Ua - Uc = 139 For new process : U = Ua - Uc = 139 W = 34 Q = U + W = 173 J Please show the figure for the next two parts

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