Chapter 1.1 - 'Heat Temperature'

Question 1

List four phases of matter.

Answer 1

1. Solids
2. Liquids
3. Gases
4. Plasma

Question 2

Explain what the term ‘heat’ refers to.

Answer 2

Transfer of thermal energy.

Question 3

Explain what the term ‘Internal Energy’ refers to.

Answer 3

The total kinetic and potential energy of the particles within the substance.

Question 4

Define the unit for heat.

Answer 4

Joules (J)

Question 5

Explain how temperature is recorded relative to heat.

Answer 5

Temperature is calculated by the average internal energy of a substance.

Question 6

Explain what ‘kelvin’ is based on.

What is the formula for kelvin?

Answer 6

Absolute zero.
(The point where the internal energy is zero).

C + 273.15 = K

Question 7

State the ‘Zeroth Law of Thermodynamics’.

Answer 7

If two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other.

A=B and C=B
Therefore A=C

Question 8

State the ‘First Law of Thermodynamics’.

Answer 8

Energy is constant, it changes from one form to another though is not created or destroyed.

Question 9

State how the change in Internal Energy is found.

Answer 9

δU = Q - W

Change in Internal Energy (δU)
Is equal to the heat (Q) minus the work done (W)

Question 10

State what Q represents.

State the unit.

Answer 10

Heat

Joules (J)

Question 11

State what U represents.

State the unit.

Answer 11

Internal Energy

Joules (J)

Question 12

State what W represents.

State the unit.

Answer 12

Work

Joules (J)