Gas pressure

Dec 2019
1
0
France
Good afternoon !
I am currently struggling with a pressure problem that is supposed to be simple, but I spent at least 3 hours on it :

A quantity of gas (p = 3 x 105 Pa, T=300K) is compressed until the half of its initial volume and is heated to 70°C. What is the final gas pressure?
I also have the answer provided :
P2=6,86 105Pa
What I do not understand is indeed all the way to find this answer...

Anyone can please help me ?

Best regards,
Mhbtba
 
Last edited:

ChipB

PHF Helper
Jun 2010
2,367
292
Morristown, NJ USA
From the Ideal Gas Law, you know that:

P_1 V_1/T_1 = P_2 V_2/T_2

You also know from the problem statement that V_2/V_1 = 1/2, and you have values for P_1, T_1, and T_2. Solve for P_2.