Strutural isomers `C_2H_5OH` and `CH_3OCH_3` have the same value of

C_2H_5OH and CH_3OCH_3 are

For which of the following parameters, the structural isomers C_2H_5OH and CH_3 OCH_3 would be expected to have the same values ? (Assume ideal behaviour )

Convert C_(2)H_(5)OH to C_(2)H_(5)OCH_(3) ?

Which of the following parameteres would be expected to have the same values for C_(2)H_(5)OH and CH_(3)OCH_(3) ?