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Vladimir [108]
3 years ago
8

Apt A piece of chalk becomes shorter as it is used. Which of the following is NOT true of the shorter piece of chalk?

Chemistry
1 answer:
Tanzania [10]3 years ago
5 0
A. It’s mass has changed if not that’s then it’s B.
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A piston in a heat engine does 500 joules of work, and 1400 joules of heat are added to the system. Determine the change in inte
san4es73 [151]

Answer : The change in internal energy is, 900 Joules.

Solution : Given,

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Formula used :

\Delta U=q+w

where,

\Delta U = change in internal energy

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w = work done

As per question, heat is added to the system that means, q is positive and work done by the system that means, w is negative.

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