Free Printable Electrochemistry

1.

Free energy from a reaction is the amount of energy that is

a)

absorbed by an entropy decreases

b)

equal to the enthalpy change

c)

wasted as heat

d)

available to do work

2.

Free energy is always available from reactions that are

a)

endothermic

b)

non spontaneous

c)

at equilibrium

d)

spontaneous

3.

Which is the correct expression of the Gibbs free energy equation

a)

$\Delta G=\Delta H-\Delta TS$

b)

$\Delta G=\Delta S-T\Delta H$

c)

$\Delta G=\Delta H-T\Delta S$

d)

$\Delta G=\Delta H\cdot T\cdot\Delta S$

4.

Gibbs free-energy change is the ( ) amount of energy that can be ( ) another process to do useful work

a)

maximum , coupled to

b)

maximum , duplicated by

c)

spontaneous , coupled to

d)

minimum duplicated by

5.

As 120 g of hot milk cools in a mug , it transfer 20,000 J of heat to the environment. What is the temperature change of the milk? The specific heat of milk is 2.6J/g $\cdot\degree C$ .(Q=mc $\Delta$ T)

a)

$64\degree C$

b)

$1.56\degree C$

c)

$640\degree C$

6.

What type of reaction is shown in the reaction pathway

a)

endothermic reaction

b)

exothermic reaction

7.

$\Delta H$ value in an endothermic reaction is a positive number

a)

True

b)

False

8.

Integral of dQ/T is independent of reversible path connecting between two points.

a)

True

b)

False

9.

Entropy is a

a)

Path function, intensive property

b)

Path function, extensive property

c)

point function, intensive property

d)

point function, extensive property

10.

The difference in the heat contents of the product and the reactants is called

a)

temperature

b)

heat of reaction

c)

heat of calorimetry

11.

Standard enthalpies occur at what set of conditions?

a)

$25\degree C\ and\ 1.0atm$

b)

$100\degree C\ and\ 1.0atm$

c)

$25\degree C\ and\ 2.0atm$

12.

When 1.0 mole of ZnO(s) decomposes, the $\Delta H$ = 348 kJ/mol of heat energy .What does this tell you about the formation of ZnO(s)?

a)

The formation of ZnO is endothermic

b)

The formation of ZnO does not require energy

c)

The formation of ZnO is exothermic

13.

When looking up enthalpy values for a set of reaction species , the enthalpy depends on the

a)

Physical state of the species

b)

color of species

c)

concentration of the species

14.

The standard enthalpy for an element in its reference form is defined as

a)

-2.0 kJ/mol

b)

0 kJ/mol

c)

2.0 kJ/mol

Electrochemistry

Total questions: 14

Worksheet time: 6mins

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