particles and matter

Question 1

what is the equation for density

Answer 1

p =m/V

Question 2

ahat are the units for density

Answer 2

kg/m cubed

Question 3

what are the units for mass

Answer 3

kg

Question 4

what are the units for volune

Answer 4

m cubed

Question 5

how are the particles in a solid areanged

Answer 5

the particles are touching and vibrate around a foxed pattern

Question 6

how are the particles in a liquid arranged

Answer 6

particles are touching but not in fixed positions, they are free to flow around

Question 7

how are particles in a gas arranged

Answer 7

particlws are far apart and move around quickly and randomly

Question 8

how are changes in state different to chemical changes

Answer 8

the material revovers its original porperties if the change is reversed

Question 9

which state of natter is most dense

Answer 9

solid

Question 10

what are the names of the five state changes

Answer 10

melting, evaporating, freezing, condensing, subliminating

Question 11

how do you measure the volume of a tegular solid

Answer 11

measure the length of three sides and multiply together

Question 12

how do you emasure the volume of an irregular solid

Answer 12

place the irrgular solid in water in a measure cylinder. measure the water by how much the water level has gona up by

Question 13

what is internal energy

Answer 13

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

Question 14

what is the definition of specific heat capacity

Answer 14

the energy needed to heat up 1kg of a material by a temperature of 1 degrees

Question 15

wwhat is the definition of latent heat

Answer 15

the energy needed to change the state of 1 kg of a substance without changing temperature

Question 16

why doesnt the temperature of a material change as its changing state

Answer 16

energy goes into breaking/ making bonds

Question 17

how do the molecules in a gas move

Answer 17

in random motion

Question 18

what happens to the speed of particles in a gas as the gas is heated

Answer 18

the speed of the particles increases as the gas is heated

Question 19

what happens to pressure if the size of a container is reduced

Answer 19

the pressure would increase as particles would hit the walls of the container more often

Question 20

the specific latent heat of fusion gives what state change

Answer 20

solid to liquid

Question 21

the specific latent heat of vaporisation gives what state change

Answer 21

from liquid to gas

Question 22

what is the equation to calculate energy change from specific heat capacity

Answer 22

🔼E=m x c x🔼ø

Question 23

what is the equation to calculate energy needed for state change

Answer 23

E= m x L