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# Before starting a journey, the tyre pressure of a car was 3 x 105Nm-2 at 27oC. A...

### Question

Before starting a journey, the tyre pressure of a car was 3 x 105Nm-2 at 27oC. At the end of the journey, the pressure rose to 4 x 105Nm-2. Calculate the temperature of the tyre after the journey, assuming the volume is constant

A) 400oC

B) 300oC

C) 273oC

D) 127oC

### Explanation:

$$\frac{P_1}{T_1}$$ = $$\frac{ P_2}{T_2}$$

$$\frac{3 \times\ 10^6}{27 + 273}$$ = $$\frac{4 \times\ 10^6}{0 + 273}$$

$$\theta$$ = 127oC

## Dicussion (1)

• $$\frac{P_1}{T_1}$$ = $$\frac{ P_2}{T_2}$$

$$\frac{3 \times\ 10^6}{27 + 273}$$ = $$\frac{4 \times\ 10^6}{0 + 273}$$

$$\theta$$ = 127oC