U Values And Specific Heat Capacity

Question 1

What does the Specific Heat Capacity of a substance allow us to do?

Answer 1

Calculate the amount of energy needed to heat it up

Question 2

Is the a Cavity wall a good insulator?

Answer 2

Yes

Question 3

Is a double glazed window a good insulator?

Answer 3

No

Question 4

How do Solar Panels work?

Answer 4

Cold water is pumped up to the solar panel where it heats up and is transferred to a storage tank. A pump pushes cold water from the storage tank through pipes in the solar panel. The water is heated by heat energy from the sun and returns to the tank.

Question 5

Advantages and Disadvantages of Solar Energy?

Answer 5

Advantages:
Renewable energy resource
No harmful polluting gases are produced
Disadvantages:
May only produce hot water in very sunny climates and in cooler areas may need to be supplemented with a conventional boiler
Although warm water can be produced even in cloudy days, solar panels do not work at night.

Question 6

What’s the difference between heat and temperature?

Answer 6

Temperature is a measure of how hot something is

Heat is a measure of the thermal energy contained in an object

Question 7

When heat energy is transferred to an object, it’s temperature increase depends on…

Answer 7

Mass
What’s it’s made from
The amount of energy transferred to an object

Question 8

What is the specific heat capacity of a substance?

Answer 8

The amount of energy needed to change the temperature of 1kg of the substance by 1 degree Celsius

Question 9

How is Water being a particularly high specific heat capacity good?

Answer 9

It makes water useful for storing heat energy and for transporting it around the home using central heating pipes

Question 10

What is the equation for Specific Heat Capacity?

Answer 10

E(Energy transferred in Joules)= m(mass in kg) X C(Specific heat capacity in joules/kg) X Temperature change in degrees

Question 11

What do U- Values measure?

Answer 11

The effectiveness of a material as an Insulator