Free Printable Entropy, Enthalpy, and Free Energy

1.

Delta H is negative indicates

a)

reaction is exothermic

b)

reaction is endothermic

c)

reaction is spontaneous

d)

reaction is not spontaneous

2.

Delta S is negative indicates

a)

enthalpy increases

b)

enthalpy decreases

c)

entropy decreases

d)

entropy increases

3.

Delta G is negative indicates

a)

reaction is exothermic

b)

reaction is endothermic

c)

reaction is spontaneous

d)

reaction is not spontaneous

4.

A phase change from solid --> liquid

a)

shows a decrease in entropy

b)

shows an increase in entropy

c)

is exothermic

d)

is endothermic

5.

A phase change from gas --> liquid

a)

shows a decrease in entropy

b)

shows an increase in entropy

c)

is exothermic

d)

is endothermic

6.

Which of these would ALWAYS indicate a process is spontaneous?

a)

$\Delta H\ is\ +\ \Delta S\ is\ +$

b)

$\Delta H\ is\ -\ \Delta S\ is\ -$

c)

$\Delta H\ is\ +\ \Delta S\ is\ -$

d)

$\Delta H\ is\ -\ \Delta S\ is\ +$

7.

If the enthalpy of the products > reactants then this reaction is said to be

a)

spontaneous

b)

endothermic

c)

exothermic

d)

unlikely

8.

The reaction $2\ H_{2\left(g\right)}+O_{2\left(g\right)}\rightarrow\ 2\ H_2O_{\left(g\right)}$ shows

a)

no change in entropy

b)

an increase in entropy

c)

a decrease in entropy

9.

According to Hess' law, if you reverse a reaction

a)

the sign of delta H must flip

b)

you do not change the delta H sign

c)

you must multiply the delta H value by 2

d)

you must divide the value of delta H by 2

10.

According to Hess' law the reaction pathway's effect on reaction enthalpy is that it

a)

doesn't matter

b)

affects the overall enthalpy change

c)

can only have one step

d)

can't have more steps than reactants

Entropy, Enthalpy, and Free Energy

Total questions: 10

Worksheet time: 6mins

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