20. In a gas tank with a volume of 50 m3 there is methane at p1=1.0 MPa and t=15 C. Due to solar radiation, the gas temperature during the day increased by Δt=15 K. How did the gas pressure increase in the gas tank and how much heat did the gas absorb? The heat capacity of methane is assumed to be independent of temperature. The methane molecule is not linear.

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