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  • Give answer! A gas can be taken from A to B via two different processes ACB and ADB. When path ACB is used 60 J of heat flows into the system and 30 J of work is done by the system. If path ADB is used work done by the system is 10 J.The heat Flow

A gas can be taken from A to B via two different processes ACB and ADB. 

When path ACB is used 60 J of heat flows into the system and 30 J of work is done by the system. If path ADB is used work done by the system is 10 J.The heat Flow into the system in path ADB is :

  • Option 1)

    40 J
     

  • Option 2)

    80 J

  • Option 3)

    100 J

  • Option 4)

    20 J

Answers (1)

best_answer

 

First law of Thermodynamics -

Heat imported to a body in is in general used to increase internal energy and work done against external pressure.

- wherein

dQ= dU+dW

 

For ACB

\Delta Q_{ACB} = \Delta W_{ACB} + \Delta U_{ACB}

60 J = 30 J + \Delta U_{ACB}

\Rightarrow \Delta U_{ACB} = 30 J

\Delta U_{ACD} = \Delta U_{ACB} = 30 J

For ACD

\Delta Q_{ACD} = \Delta U_{ACB} +\Delta W_{ADB}

= 30 + 10 = 40 J


Option 1)

40 J
 

Option 2)

80 J

Option 3)

100 J

Option 4)

20 J

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