The temperature Ton thermodynamic scale is defined in terms of a property `p` by the relation `T=a lnp+b` where `a` and `b` are constants.The termperature of the ice point and steam point are assigned the numbers 32 and 212 respectively and the values of `p` at these temperatures are 1.86 and 6.81 respectively. Calculate the temperature on this scale when `p=2.50`
