Question

An unknown liquid solute is added to the solvent water, the two liquids are miscible. the temp drops. true or false:
a. the entropy of the solution increases compared to the pure substance
b. the process is endothermic
c. the intermolecular attractions are stronger in the solution than the intermolecular attractions in the pure substances
d. delta H mix is negative
e. the liquid is likely nonpolar

Answer 1

a. the entropy of the solution increases compared to the pure substance (TRUE)

b. the process is endothermic (TRUE )

c. the intermolecular attractions are stronger in the solution than the intermolecular attractions in the pure substances (False)

d. delta H mix is negative    (False)

e. the liquid is likely nonpolar (False)

reasons :

1 ) mixing process always disorder increases so entropy increases

2) temp is dropping means it is endothermic reaction

3) if the intermolecular attractions are stronger in the solution than the intermolecular attractions in the pure substances in this case deltaH = -ve . but it is +ve

4) delta H mix is negative wrong . it is negative

5) the liquid is likely nonpolar wrong . it is polar so miscible with water