A) 50 kJ
B) 70 kJ
C) 120 kJ
D) 170 kJ
Correct Answer: D
Solution :
\[{{Q}_{1\,-\,2}}=+\,100\,\,kJ,\] \[{{W}_{1\,-\,2}}=+\,50\,\,kJ\] \[{{Q}_{1\,-\,2}}={{W}_{1\,-\,2}}+{{U}_{1\,-\,2}}\] \[{{U}_{1\,-\,2}}=100-50=50\,\,kJ\] \[{{Q}_{2\,-\,1}}={{W}_{2\,-\,1}}+{{U}_{2\,-\,1}}\] \[120={{W}_{2\,-\,1}}-50\] \[{{W}_{2\,-\,1}}=170\,\,kJ\]You need to login to perform this action.
You will be redirected in
3 sec