First slide

First law of thermo dynamics

Question

A system absorbs 10 KJ of heat at constant volume and its temperature rises from 27⁰C to 37⁰C. The ΔE of reaction is

Easy

A

100KJ
B

10KJ
C

0
D

1KJ

Solution

ΔE = q+W = q+(-PΔV)
Δv = 0 ;ΔE = q_v = 10KJ

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