Question

Calculate the pressure change if two moles of
steam at 5 x 102K occupying 0.03 m3of volume
is heated up to 1 x 103 K at constant volume.
Assume that steam behaves as Van der Waals
gas. It is given that

Answer 1

Solution.

V = const.

$$\frac{p1}{T1} = \frac{p2}{T2}$$

$$p \times V = n \times R \times T$$

$$p1 = \frac{n \times R \times T1}{V1}$$

p1 = 277000 Pa

p2 = 554000 Pa

$$\Delta p = p2-p1$$

$$\Delta p = 277000 Pa$$

Answer:

$$\Delta p = 277000Pa$$