Answer to Question #327486 in General Chemistry for Dumbo

Question

1.The entropy will usually increase when;

I.a molecule is broken into two or more smaller molecules.

II.a reaction occurs that results in an increase in the number of moles of gas.

III.a solid changes to a liquid.

IV.a liquid changes to a gas.

a. I only

b.II only

c.III only

d.IV only

e.I, II, III, and IV

2.For the reaction, A + B → C, ΔHo = +30 kJ; ΔSo = +50 J/K. Therefore the reaction is:

a.spontaneous at all temperatures.

b.nonspontaneous at all temperatures.

c.spontaneous at temperatures less than 600 K.

d.spontaneous at temperatures greater than 600 K.

e.spontaneous only at 25oC.

3.The thermodynamic quantity that expresses the degree of disorder in a system is __________. 

a.enthalpy  

b.internal energy

c.bond energy

d.entropy

e.heat flow 

Answer 1

1. e.I, II, III, and IV

2. a.spontaneous at all temperatures

3. d.entropy