Internal Energy

Question 1

What is temperature?

Answer 1

how hot or cold something is

Question 2

What is temperature measured in?

Answer 2

Degrees Celsius (°C)

Question 3

What is heat energy?

Answer 3

the measure of thermal energy

Question 4

What is heat energy measured in?

Answer 4

Jules ( J )

Question 5

What 2 things can heat energy change?

Answer 5

• the temperature of a substance
• the state of a substance

Question 6

What type of change is a change of state

Answer 6

a physical change

Question 7

What is internal energy?

Answer 7

total kinetic and potential energy of all the particles that make up a system

Question 8

What is kinetic energy?

Answer 8

energy due to movement

Question 9

What is potential energy?

Answer 9

energy due to arrangement or spacing

Question 10

What is the formula for change in thermal energy?

Answer 10

Change in thermal energy = mass x specific heat capacity x change in temperature

Question 11

what is the unit for change in thermal energy?

Answer 11

joules (J)

Question 12

what is the unit for specific heat capacity?

Answer 12

joules per kilogram Degrees Celsius ( J/Kg °C)

Question 13

what is the unit for mass?

Answer 13

Kilograms (Kg)

Question 14

What is specific heat capacity?

Answer 14

the amount of energy required to change the temperature of one kilogram of a substance by one degree Celsius

Question 14

What is the unit for temperature change?

Answer 14

Celsius ( °C)

Question 14

What does heat capacity depend on?

Answer 14

mass

Question 15

What does a lower specific heat capacity mean?

Answer 15

quicker to heat up a substance and quicker to cool down a substance

Question 16

what does a higher specific heat capacity mean?

Answer 16

slower to heat up a substance and slower to cool down a substance.