Question

When a system is taken from the state 'a' to state 'b' along the path 'acb', it is found that a quantity of heat $Q=200J$ is absorbed by the system and a work $W=80J$ is done by it. Along the path 'adb', $Q=144J$. The work done along the path 'adb' is

• A. $6J$
• B. $12J$
• C. $18J$
• D. $24J$

Answer 1

The correct option is D $24J$

a system is taken from the state 'a' to state 'b' along the path 'acb', it is found that a quantity of heat Q=200J is absorbed by the system and a work W=80J is done by it. Along the path 'adb', Q=144J.

The net heat in the process is $Q=200-144=56J$

The work done along path $"abd"$=work done by system-heat

$W_{abd}=80-56=24J$