4)
pV1=vRT1
pV2=vRT2
V2=n*V1 => T2=n*T1
A=p(V2-V1)=vRT2-vRT1=vR(T2-T1)
T2-T1=A/(vR)
n*T1-T1=A/(vR)
(n-1)*T1=A/(vR)
T1=A/(vR*(n-1))=10000/(4*8,31*(2-1)) К = 300,8424 К ~ 27,8 C
T2=n*T1=n*A/(vR*(n-1)) = 2*10000/(4*8,31*(2-1)) К= 601,6847 ~ 328,7 C
ответ температура изменилась от 27,8 C до 328,7 C
5)
p1V1/T1=p2V2/T2=p3V3/T3
p1=p
V1=V2
p2=p3
*********
A=p3*(V3-V1)= ?
************
p3=p2=p1*V1/V2*T2/T1=p*1*T2/T1=p*T2/T1
V3=V1*p1/p3*T3/T1=V1*T1/T2*T3/T1=V1*T3/T2
A=p3*(V3-V1)=p*T2/T1(V1*T3/T2-V1)=p*V1*T2/T1*(T3/T2-1)=p*V1*(T3-T2)/T1=
=100000*10*10^(-3)*(380-350)/300 Дж = 100 Дж