# Homework Help: Ideal Gas Law

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1. Dec 12, 2016

### Nick88

1. The problem statement, all variables and given/known data
What is the change in internal energy (in Joules) of an ideal gas that does 4.675x10^5J of work, while 2.95x10^6J of heat is transferred into the system and 7.95x10^6J of heat is transferred from the system to the environment? Calculate the change in temperature of the two moles of the gas. (R=8.314 J/mol.k)

2. Relevant equations
Formulas on equation sheet relating to concept: U=3/2 nRT, change in U=Q-W

3. The attempt at a solution
Me and my friend attempted two different ways, i'm probably wrong but my setup was
4.675x10^5=8.314(1)(T)
2.95x10^6=8.314(1)(T)
I found the two answers and added then together and did 7.95x10^6=8.314(2)(T) found this answer, then subtracted the two answers to get a final temperature.

2. Dec 12, 2016

### Staff: Mentor

What is the net amount of heat transferred to the gas? From the first law, what is the change in internal energy?