842 J of works was done for a gas to be compressed. At the same time, it releases 451 J of heat. What is the change in the energy of the system?

Melina Barber
2022-09-25
Answered

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Claire Larson

Answered 2022-09-26
Author has **10** answers

Given ->

Work = +842 J ( work done on the system)

Q = -451 J ( heat released)

According to first law of thermodynamics->

$\mathrm{\u25b3}E=Q+W\phantom{\rule{0ex}{0ex}}\mathrm{\u25b3}E=-451+842\phantom{\rule{0ex}{0ex}}\mathrm{\u25b3}E=+391\text{}J$

Change in energy = 391 J

Work = +842 J ( work done on the system)

Q = -451 J ( heat released)

According to first law of thermodynamics->

$\mathrm{\u25b3}E=Q+W\phantom{\rule{0ex}{0ex}}\mathrm{\u25b3}E=-451+842\phantom{\rule{0ex}{0ex}}\mathrm{\u25b3}E=+391\text{}J$

Change in energy = 391 J

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