(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

2 moles of a monatomic ideal gas expands from state A to state B. P_{A}= P_{B}= 600 N/m^{2}, V_{A}= 3.0 m^{3}and V_{B}= 9.0 m^{3}.

i. Calculate the work done by the gas as it expands.

ii. Calculate the change in internal energy of the gas as it expands.

iii. Calculate the heat added to or removed from the gas during this expansion.

2. Relevant equations

ΔE = q-w

w = PΔV

PV = nRT

R = 8.314 J/mol*K

3. The attempt at a solution

i. w = PΔV

w = (600)(9-6) = 3600 J

ii. 4.186 J of work = cal of heat ?

3600/4.186 = 860 cals

I'm having troubles with ii and iii, I'm not sure if the converting of the work into calories is correct. I've looked at all the possible formulas and I'm not sure how to go about finding internal energy with only pressure and volume. Help, please!

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# Homework Help: Internal Energy of an Expanding Gas

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