(19-39) In the process of taking a gas from state a to state c along the curved path shown in Fig. 19-32, 85 J of heat leaves the system and 55 J of work is done on the system.(a) Determine the change in internal energy, E_int,a−E_int,c.(b) When the gas is taken along the path cda, the work done by the gas is W=38J . How much heat Q is added to the gas in the process cda? (c) If P_a=2.2P_d, how much work is done by the gas in the process abc? (d) What is Q for path abc? (e) If E_int,a−E_int,b=15J, what is Q for the process bc? Here is a summary of what is given:

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