1.

In a given process of an ideal gas, dW = 0 and dQ < 0. Then for the gas (a) the temperature will decrease, (b) the volume will increase (c) the pressure will remain constant (d) the temperature will increase

Answer»

Correct answer is (a) From first law of thermodynamics 

dQ = dU + dW 

dQ = dU (if dW = 0) 

Since, dQ < 0 

dU < 0

or Ufinal < Uinitial 

Hence, temperature will decrease.



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