A43.0%/57.0% by volume propane/n-butane mixture is cooled from 367°c to 163°c. flnd the change in ethalpy of this mixture by following the steps below. assume ideal behavior a) what is the average molar mass of the mixture? number g/mol b) what is the change in specific enthalpy of pure propane from 367°c to 163°c? number kj/ mol c) what is the change in specific enthalpy of pure n-butane from 367°c to 163 c? number kj/ mol
d) what is the change in specific enthalpy of the mixture from 367°c to 163°c? number kj/ mol e) what is the change in enthalpy of the mixture from 367°c to 163'c in kj/kg? number kj/ kg

i need mutiple choices

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

l dont know l am s sorry