Question

V1=2V2
P2=P1+дельтаP
дельтаP=120 кПа
T2=T1+дельта
Т дельта Т=0.1 Т1
P1-?

Answer 1

PV/T = const;

P1V1/T1 = P2V2/T2 ; 

P1V1/T1 = V1(P1+дP)/2(T1 + дT);

P1 = T1V1(P1+дP)/2(1.1T1)V1;

P1 = P1 + дP/2.2

2.2P1 = P1 + дP;

1.2P1 = дP;

P1 = 120000/1.2 = 100 кПа.