Sci 3 (4)

Question 1

Who is credited with being the first to describe latent heat?

Answer 1

Joseph Black

Question 2

What is the latent heat involved in melting a solid or freezing a liquid called?

Answer 2

heat of fusion

Question 3

What is the latent heat involved in vaporizing a liquid or solid or condensing a gas called?

Answer 3

heat of vaporization

Question 4

Who was notably a student of Joseph Black?

Answer 4

James Watt

Question 5

What is enthalpy?

Answer 5

The energy content of a system

Question 6

What process measures enthalpy changes?

Answer 6

calorimetry

Question 7

How much heat does it take to raise the temperature of 1 gram of water by 1 degree celsius?

Answer 7

4.18 joules

Question 8

Hess’s Law

Answer 8

The heat evolved or absorbed in a chemical process is the same whether the process takes place in one or in several steps

Question 9

What does the first law of thermodynamics concern?

Answer 9

enthalpy

Question 10

What concept does Hess’s law pertain to?

Answer 10

enthalpy

Question 11

What is entropy?

Answer 11

the energy associated with disorder

Question 12

What does the second law of thermodynamics concern?

Answer 12

entropy

Question 13

What is the state symbol for entropy?

Answer 13

S

Question 14

What does a smaller entropy value mean?

Answer 14

more order

Question 15

How is Gibbs Free Energy calculated?

Answer 15

enthalpy-(kelvin temperature*entropy)=Gibbs

Question 16

When does a reaction occur spontaneously?

Answer 16

Gibbs Free Energy - If enthalpy is negative and entropy is positive

Question 17

If a galvanic cell voltage is positive, what does this indicate about a reaction?

Answer 17

it will be spontaneous