The internal energy change in a system that h | vedclass

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Question

(A) According to the first law of thermodynamics,the heat energy supplied to a system is given by $dQ = dU + dW$,where $dU$ is the change in internal

Vedclass · Accepted Answer

$7900$

Vedclass · Answer

(A) According to the first law of thermodynamics,the heat energy supplied to a system is given by $dQ = dU + dW$,where $dU$ is the change in internal energy and $dW$ is the work done by the system.Given:Heat absorbed $dQ = 2 \, kcal = 2000 \, cal$.Since $1 \, cal = 4.2 \, J$,we have $dQ = 2000 	imes 4.2 \, J = 8400 \, J$.Work done $dW = 500 \, J$.Substituting these values into the equation:$8400 \, J = dU + 500 \, J$$dU = 8400 \, J - 500 \, J$$dU = 7900 \, J$.Therefore,the change in internal energy is $7900 \, J$.

The internal energy change in a system that has absorbed $2 \, kcal$ of heat and done $500 \, J$ of work is ........... $J$.

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