Question

6.
A gas expands against a constant external pressure of 2.00 atm, increasing its volume by 340 L
Simultaneously, the system absorbs 400 J of heat from its surroundings. What is E, in joules, for
this gas?
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Answer 1

Answer:

First law of thermodynamics:

This law is based upon the conservation of energy,

The mathematical form of the first law of thermodynamics is:

ΔE=q+w

Here

ΔE = Change in internal energy

q= Absorbed heat by the system

w= Work done on the system.

So,

ΔE=q−PΔV

ΔE=400−2×3.4×101.33 J

ΔE=−289 J