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# A gas at pressure PN-m-2 and temperature 27°C is heated to 77°C at constant vo...

### Question

A gas at pressure PN-m-2 and temperature 27°C is heated to 77°C at constant volume. The new pressure is

A)
0.85 PN-m-2
B)
0.86 PN-m-2
C)
1.16 PN-m-2
D)
1.18 PN-m-2
E)
2.85 PN-m-2

### Explanation:

At constant volume,
$$\frac{P_1}{T_1}$$ = $$\frac{P_2}{T_2}$$
$$\frac{P_1}{27 +273}$$ = $$\frac{27}{27 + 273}$$
P2 = 1.16 PN-m-2

## Discussion (2)

• Lukman Abdullahi

The solution is authomagically wrong
The question is from charle's laws

At constants volume.P1/T1=P2/T2
P1/27+273=P2/77+273
P1/300=P2/350
Cross multiply
300P2=350p
Divide both side by coefficient P2
350p/300p2
P2=1.16PN-m²

• At constant volume,
$$\frac{P_1}{T_1}$$ = $$\frac{P_2}{T_2}$$
$$\frac{P_1}{27 +273}$$ = $$\frac{27}{27 + 273}$$
P2 = 1.16 PN-m-2