Change in internal energy when `4 kJ` of work is done on the system and `1 kJ` of heat is given out of the system isA. `+ 1 kJ`B. `- 5 kJ`C. `+ 5 kJ`D. `+ 3 kJ`

Change in internal energy when `4 kJ` of work is done on the system an

1.	Change in internal energy when `4 kJ` of work is done on the system and `1 kJ` of heat is given out of the system isA. `+ 1 kJ`B. `- 5 kJ`C. `+ 5 kJ`D. `+ 3 kJ`
Answer» Correct Answer - D According to the first law of thermodynamics, `Delta U = q + w` `= (- 1 kJ) + (4 kJ)` `= + 3 kJ` Thus, the internal energy of the system increases.

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Change in internal energy when `4 kJ` of work is done on the system and `1 kJ` of heat is given out of the system isA. `+ 1 kJ`B. `- 5 kJ`C. `+ 5 kJ`D. `+ 3 kJ`

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