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When the state of a system changes from \mathrm{A \: to\: B} adiabatically the work done on the system is \mathrm{322\: \: Joule}. If the state of the same system is changed from \mathrm{B\: to \: A} by another process, and \mathrm{100 \mathrm{~J}} of heat is required then work done in this process will be
 

Option: 1

\mathrm{422 \: Joule}




 


Option: 2

\mathrm{-100 \: Joule}
 


Option: 3

\mathrm{222 \: Joule}
 


Option: 4

\mathrm{ -222 \: Joule}


Answers (1)

best_answer

\mathrm{A} \rightarrow \mathrm{B}

\mathrm{ \Delta \mathrm{Q}=\Delta \mathrm{U}+\Delta \mathrm{W} }

\mathrm{ 0=-322+\Delta \mathrm{U} \Rightarrow \Delta \mathrm{U}=322 \mathrm{~J} }

\mathrm{ \mathrm{~B} \rightarrow \mathrm{A} }

\mathrm{ \Delta \mathrm{U}=322 \mathrm{~J} }

\mathrm{ \Delta \mathrm{Q}=100 \mathrm{~J} }

\mathrm{ 100-\Delta \mathrm{W}=\Delta \mathrm{U}=322 \Rightarrow \Delta \mathrm{W}=-222 \mathrm{~J} }





 

Posted by

Deependra Verma

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