Little help with thermodynamic question

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the question is in the attachment. All i really want to know is when you have to find the final pressure and temperature do you use the equation

p1 v1^k = p2 v2^k

where k is the the polytrophic index

thanks
 

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Thread moved to Homework Help.

Welcome to the PF, tweety. One of the rules we have for homework and coursework is that you show some of your own work, before we can offer tutorial help.

So what is your approach to this problem?
 
yea i just realized i don't no how to find the heat transferred as well but

i got the final pressure to be 15.8 bar and the final temp to be 328K and the work done to be 29KJ

ive done this by using the first equation above to find final P and PV=RT to find the final temp

is this right ? i haven't got any answers to them

thanks
 
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