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A 200-gram sample of dry air is heated isobarically. Its entropy increases by 19.2 J/K and the work done by expansion is 1.61x10

^{3}J. Solve for the final temperature of the air.

Okay, since p=const => dq=C

_{p}dT thus instead of dq=du+dw we can write

dq=dq(C

_{v}/C

_{p})+dw

can find dq=460.46

So i know dq,du,dw,d[tex]\phi[/tex], but how do I get final temperature? All I can find is dT but it's useless sine I don't know initial temperature.

And where do I put mass and how to use the d[tex]\phi[/tex]=dq/T formula? Looks like it will be needed here...

Thanks a lot in advance!