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First Law of Thermodynamics

If change in ...

Question

If change in internal energy is given by $- 120 J$ . The work done by the system is 280 J. Calculate the heat associated with the process.

A

160 J

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B

- 160

J

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C

- 400

J

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D

400

J

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Solution

The correct option is A 160 J
From first law of thermodynamics,
$Δ U$ = $Q + W$
Given, $Δ U$ = $- 120$ J and $W$ = -280 J
So, $Q$ = $- 120 + 280$ J = 160 J

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First Law of Thermodynamics

Standard XIII Chemistry

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