1. The ideal gas law is given as PV=nRT, where n is he number of moles of gas (1
ID: 1320515 • Letter: 1
Question
1. The ideal gas law is given as PV=nRT, where n is he number of moles of gas (1 mole=6.022x10^23 molecules) and R is the universal gas contant (R=8.31 J/Mol-K). Based on this law, explain why the the product of pressure and volume is constant in an isothermal process.
2. Expalin why the ratio of pressure and temperature is constant in an isovolumetric process.
3. Explain the origin of pressure of a gas in a container based on the motions of molecules in the gas, theri average momentum, and their collisions with the walls of a container.
Explanation / Answer
isothermal process - A process where temperature is held constant. So right hand side of the equation just becomes a product of constants, which is a constant.
Isovolumetric process - A process where volume is held constant. For the same reasons right hand side of P/T = nR/V, is a constant.
Pressure comes into play whenever force is exerted on a certain area, but it plays a particularly important role with regard to gases. The kinetic theory tells us that gas molecules obey Newton
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