P6 - Particle Model

Question 1

What is internal energy?

Answer 1

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

Question 2

define specific heat capacity

Answer 2

amount of energy requires to raise the temperature of 1kg of the substance by 1 degree celsius. Formula is

Question 3

what is specific latent heat?

Answer 3

amount of energy required to change the state of 1kg of the substance with no change in temperature.

Question 4

what is the formula for specific heat capacity?

Answer 4

change in thermal energy(J)= mass(KG) x specific heat capacity(J/kg°C x temperature change(°C).
E = MCΔθ

Question 5

what is the formula for specific latent heat?

Answer 5

thermal energy for a change of state(J) = mass x specific latent heat
E = ML

Question 6

what is the formula to calculate density?

Answer 6

density(kg/m³) = mass(kg) / volume (m³)
P = M/V

Question 7

Define all the changes in states.

Answer 7

A solid melts into a liquid. A liquid solidifies into a solid.
A liquid evaporates to a gas, A gas condenses into a liquid.
A solid can sublimate straight into a gas.