Physics-
General
Easy

Question

Consider the thermodynamics cycle shown on PV diagram The process A rightwards arrow B is isobaric, B rightwards arrow C is isochoric. The following internal energy and heat are given:d U subscript A rightwards arrow B end subscript equals plus 400 text end text k J and Q subscript B rightwards arrow C end subscript equals negative 500 text end text k J. The heat flow in the process Q subscript C rightwards arrow A end subscript is :

  1. -20 kJ    
  2. +25 kJ    
  3. -25 kJ    
  4. Data are insufficient    

The correct answer is: -25 kJ

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