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I know how to use the ideal gas law...but not sure how the mass (M) figures into

ID: 1860865 • Letter: I

Question

I know how to use the ideal gas law...but not sure how the mass (M) figures into this problem.  I know there are no numbers involved, so am assuming that everything will be done in terms of  P, V, T, etc...any help is appreciated!


Also, does the equation TV^(gamma-1) = constant have anything to do with this, maybe?


An ideal gas is contained in an adiabatic pump closed by an adiabatic piston of negligible

mass and the external pressure is maintained at P1. In the initial equilibrium state, the gas

volume is V1, and temperature T1. A mass M is placed on the piston. Calculate the final

pressure, temperature and volume of the gas.

Explanation / Answer

PV=nRT ;

where n is no. of moles whic is mass of gas/molecular mass of gas ; and R is gas constant = 8.31 ;;

no, Tv^(k-1 ) has nothing to do with it ,for the last question, apply both these equations