P3

Question 1

What is specific latent heat

Answer 1

The amount of energy required to change the state of one KG of a substance with no change in temperature

Question 2

What is Specific heat capacity

Answer 2

The amount of energy to raise the temperature of 1KG of a substance by 1 degree Celsius

Question 3

Equation for specific heat capacity

Answer 3

Change in thermal energy
——————————————————
Mass X. Temperature change

Question 4

Name the apparatus used in the specific heat capacity practical

Answer 4

Beaker
Balance- scale
Insulating foam
Immersive heater
Joule meter
Thermometer
Power pack

Question 5

Explain the specific heat capacity practicle

Answer 5

⭐️Place beaker on a balance and press zero
⭐️Add oil and record mass and temp of oil
⭐️Wrap beaker in insulating foam
⭐️Connect immersion heater
⭐️Connect joulemeter and power pack to immersion heater
⭐️Leave for about 30 min
⭐️Read the amount of joule energy transferred from the immersion heater to the oil
⭐️Record final temperature

Question 6

Name two sources of inaccuracy and its solutions in the specific heat capacity practical

Answer 6

Thermal energy passing out of the beaker into the air
SOLUTION- use insulator with a low thermal conductivity

Thermal energy may not be spread throughout the oil
SOLUTION: stir the oil

Question 7

what is the equation for density

Answer 7

Density = mass
—————-
Volume