Question

For one mole of substance at a given temperature, select the member in each pair with the higher entropy. (NOTE: Only ONE submission is allowed for this question.)

(a)

C₂H₅OH(l) OR CH₃OH(l)    

(b)

KClO₂(s) OR KClO₃(aq)    

(c)

HNO₃(aq) OR HNO₃(l)   

Answer 1

(a)

C₂H₅OH(l) has higher entropy

C₂H₅OH(l) molar mass= 46 g/mol , CH3OH(l) molar mass =32 g/mol

it is due to high molar mass of C₂H₅OH(l). if molar mass increase entropy value also increase because of increasing randomness

(b)

KClO₃(aq) has higher entropy

KClO₃(aq) is liquid state and KClO2(s) is in solid state . liquids have higher disorder than solids . disorder increase entropy increase

(c)   HNO₃(aq) has higher entropy

HNO₃(aq) contain both water and HNO3 molecules   and HNO₃(l) only contain HNO3 molecules only. so number of molecules increase randomness increases which alter the increaseing in entropy