To solve this problem we can use the Ideal gas law:
We deduce from the text:
V1=478mL
T1=29°C=302.15K
V2=1132mL
T2=62°C=335.15K
P2=1.7atm
Then we just have to solve for P1 and use the provided data:
The initial pressure was P1= 3.63atm
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