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Q3. (a) Van der Waal’s equation for the pressure, p, of a real gas is:

p + a/v² (v - b) = RT

Transpose the terms in the equation to make p the subject. (6)

(b) The resistance, R ohms, of copper wire at t°C is given by:

R = R₀ (1 + αt) where R₀ is the resistance at 0°C and α is the temperature coefficient of resistance.

R = 26.48 when t = 25 and R = 27.84 when t = 33

Calculate the values of R₀ and α. (10)