Which of the following curves represent the variation of coefficient of volume expansion of an ideal gas at constant pressure?

Step-by-step solution

Volume expansion is the expansion of volume of a gas due to increase in its temperature. Coefficient of volume expansion is given as _ V = V V T ...(i) where, V= real volume of gas, V - change in volume and T= change in temperature. From idcal gas cquation, p V=n R T or T= p V n R ...(ii) For constant pressure, aligned p V &=n R T V T &= n R p ...(iii) aligned From Eqs. (i) and (iii), we get _ V = n R p V = 1 T [ From Eq. (ii) ] Thus, the variation of _ V with temperature is correctly depicted in option (b).