T1=300K
T2=360K
P2=P1+0,81
P1=?
Изохорный процесс следовательно
P1/T1=P2/T2
P1*T2=P2*T1
360K*P1 = 300(P1+0,81)
6P1 = 5P1 + 4,05
P1 = 4,05 МПа
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