a large closed bag of plastic contains 0.10 m^3 of an unknown gas at an initial

Question

a large closed bag of plastic contains 0.10 m^3 of an unknown gas at an initial temperature of 10 degrees Celsius and at the same pressure as the surrounding atmosphere, 1.0 atm. You place this bag in the sun and let the gas warm up to 38 degrees celsius and expand to 0.11m^3. During this process, the gas absorbs 840 cal of heat. Assume the bag is large enough so the gas never strains against it, and therefore remains at a constant pressure of 1.0atm.

A) how many moles of gas are in the bag?

B) what is the work done by the gas in the bag against the atmosphere during expansion

C)What is the change in the internal energy of the gas in the bag

D) Is the gas a monoatomic gas? A diatomic gas?

Explanation / Answer

a. PV=nRT

1*.10=n*8.205

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