Quantity of Heat and Heat Transfer

Question 1

Define heat

Answer 1

Heat is a form of energy that can cause a rise in temperature when added or a fall in temperature when withdrawn

Question 2

Name three methods of Heat Transfer

Answer 2

Convection

Radiation

Conduction

Question 3

What is Convection

Answer 3

It is the transfer of heat through a fluid by movement of heated fluid(convection currents)

Question 4

What is Radiation

Answer 4

The movement of heat through a vacuum (Infrared Electromagnetic Waves)

Question 5

What is Conduction

Answer 5

It is the movement of heat energy through a substance by vibrations passed from one particle to the next (solid)

Question 6

What is the U value

Answer 6

U values is a measure of the conductivity of a substance

Question 7

What is meant by the U-value of a material

Answer 7

It is the heat lost per second through each metre squared per k difference across the material

Question 8

U value of a house is………

Answer 8

A measure of the rate of heat loss to the surroundings

Question 9

What is the Specific Heat Capacity

Answer 9

The heat required to raise the temperature of the unit mass of a given substance by a given amount(usually one degree)

Question 10

What is Heat Capacity

Answer 10

The heat capacity of an object is the heat energy needed to change the temp of the object by one Kelvin