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3 years ago

(Thermodynamics)

Chemistry

1 answer:

horrorfan [7]3 years ago

6 0

Answers:

G. -; H. -; I. +

Step-by-step explanation:

ΔE = q + w

Anything going into the system is positive (+), and anything leaving the system is negative (-).

G. Cooling with expansion

q: Heat is leaving; q is -

w: The system is doing work on the surroundings. Energy is leaving the system. w is -.

ΔE is -.

H. Heating a little, expanding a lot

q: Heat is entering; q is +.

w: The system is doing work on the surroundings. Energy is leaving the system. w is -.

However, the expansion work is the major factor.

ΔE ≈ w. ΔE is -.

I. Endothermic, no expansion

q: Heat is entering; q is +.

w: No expansion. w = 0.

ΔE = q. ΔE is +.

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