A closed system which creates work done by expansion is 50 km and decrease internal energy is 30kj then what is heat transfer during process.A. -20kjB. + 20 kjC. - 80 kjD. + 80 kj

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Sanai Douglas · Accepted Answer

Given: The work done by the closed system by expansion is 50 kJ. The internal energy is decreased to 30 kJ.The relationship between internal energy, work done and heat is expressed as,  △  U  =  q  +  wWhere,Where,  △  U is the internal energy change.q is the heat transferred.w is the work done.As the work is done by expansion, the value of work done is -50 kJ. The internal energy is decreased during this process. Therefore, the value of internal energy is -30 kJSubstitute the value of work done and internal energy in equation.  −  30   kJ  =  q  −  50   kJ    q  =  −  30   kJ  +  50   kJ    =  20   kJAnswer: The amount of heat transferred during this process is 20 kJ. Therefore, the correct option is &quot;B&quot;.

A closed system which creates work done by expansion is 50 km and decrease internal energy is 30kj then what is heat transfer during process. A. -20kj B. + 20 kj C. - 80 kj D. + 80 kj

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