Thou Shall Not Forget Unit 9

Thermodynamically favorable reactions have what sign for  $\Delta$  G?

• negative

• positive

 

Reactions with what sign for  $\Delta$  H and  $\Delta$  S are ALWAYS thermodynamically favorable?

• +, +

• -,-

• -, +

• +, -

If the entropy term is unfavorable and the enthalpy term is favorable, at what temperatures will  $\Delta$  G be negative?

• low 

• high

• all

• none

If the entropy term is favorable and the enthalpy term is unfavorable, at what temperatures is  $\Delta$  G negative (favorable)?

• low

• high

• none

• all

If a reaction increases the number of moles of gas, then the sign for entropy is what?

• positive

• negative

At equilibrium, what is the value of  $\Delta$  G?

• zero

• one

• need more information

What are the most common units for  $\Delta$  H?

• kJ/mol

• J/mol

• K/mol

• kJ/K

When using  $\Delta$  G=-RTlnK, the value for R is?

• 62.36 L torr mol-1K-1

• 0.08206 L atm mol-1K-1

• 8.314 J mol-1 K-1

If  $\Delta$  G is negative, the Keq is greater than or less than 1?

• greater

• less

When  $\Delta$  G = 0, K=1. 

• true

• false