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3 years ago

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Calculate the change internal energy (ΔE) for a system that is giving off 65.0 kJ of heat and is performing 855 J of work on the

surroundings. Calculate the change internal energy (ΔE) for a system that is giving off 65.0 kJ of heat and is performing 855 J of work on the surroundings. 9.00 x 102 kJ 64.1 kJ -9.00 x 102 kJ -64.1 kJ -65.9 kJ

1 answer:

ollegr [7]3 years ago

6 0

Answer: -64.1 kJ.

Explanation:

According to first law of thermodynamics:

$\Delta E=q+w$

$\Delta E$ =Change in internal energy

q = heat absorbed or released

w = work done or by the system

w = work done by the system= $-P\Delta V$ {Work is done by the system is negative as the final volume is greater than initial volume}

w = -855 Joules = 0.855 kJ (1kJ=1000J)

q = -65.0 kJ {Heat released by the system is negative}

$\Delta E=-65.0J-(-0.855J)=-64.1kJ$

Thus the change internal energy (ΔE) for a system that is giving off 65.0 kJ of heat and is performing 855 J of work on the surroundings is -64.1 kJ.

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