C3:Particle model of matter

Question 1

how do you calculate density (kg/m^3)

Answer 1

mass(kg) / volume(m^3)

Question 2

How do you find the density of an irregul\r shape

Answer 2

step 1: put object onto the balance and record the mass
step 2:fill up a eureka can with water
step 4:put object inside of the eureka can and measure the displaced water in the measuring cylinder.

Question 3

what is a system

Answer 3

an object or a group of objects

Question 4

what is internal energy

Answer 4

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

Question 5

how do you calculate na change in temperature (j)

Answer 5

mass x specific heat capacity(j/kg celsius) x temperature change (celsius)

Question 6

what is specific heat capacity

Answer 6

amount of energy required to raise the temperature of one kg pf the substance by one degree celsius

Question 7

what is latent heat

Answer 7

energy needed for a substance to change state

Question 8

how do you calculate energy for a change of state (j)

Answer 8

mass x specific latent heat(j/kg)

Question 9

what is internal energy

Answer 9

sum of kinetic energy and potential energy of all particles in a substance

Question 10

how do you calculate latent heat (j)

Answer 10

mass(kg) x specififc latent heat (j/kg)

Question 11

what happens when you heat up a gas

Answer 11

increase particles kenetic energy which means they collide more frequently and with greater force
this causes an increase i pressure