In adiabatic process
PV^(alpha) = constant
alpha = 1.66 for an ideal monoatomic gas
so,
P1V1^(alpha) = P2V2^(alpha)
1*(0.07/0/03)^1.66 = P2 = 4.08 atm
V2T2^(1/1.66-1) = V1 T1(1/1.66-1)
T2 = 611.9 k
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