Thermodynamics - know process, work and change in entropy. Final temperature?

[HHveluj]

So, the problem is:
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 1.61x10³ J. Solve for the final temperature of the air.

Okay, since p=const => dq=C_pdT 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$$\phi$$, 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$$\phi$$=dq/T formula? Looks like it will be needed here...

Thanks a lot in advance!

 

[HHveluj]

nevermind. solved it.

 

[smileystorm]

Aw. I have this problem too and I'm stuck on it. :(

 

[HHveluj]

Get Tfinal - Tinitial through work, then you can solve integral dphi=dq/t and get the answer for Tfinal.

 

[cec06c]

I have this problem too and i still do not understand how you can solve for T final if there is not an initial temp given.