Year 10 Triple Homework - Wednesday 19th January - David Spratt | Biblioteka

1

Define 'conservation of mass'

Total mass is the higher before reaction

Total mass is the same before and after a reaction

Total mass is the lower after a reaction

1

Why does temperature not change during a state change?

Energy used to make particles move more increasing the internal energy not temperature

Energy used to make/break bonds increasing the internal energy and temperature

Energy used to make/break bonds increasing the internal energy not temperature

1

Define "internal energy"

Total kinetic and potential energy of particles in a system

Average kinetic energy of particles in a system

Average potential and kinetic energy of particles in a system

Total kinetic energy of particles in a system

1

How does heating affect the internal energy of a system?

it increases it

it decreases it

no effect

1

State the equation for change in thermal energy

Change in energy (J) = mass (kg) x specific heat capacity (J/Kg°C) x change in temperature (°C)

∆ E = m c ∆ θ Change in energy (J) = mass (kg) x specific heat capacity (J/Kg°C) x change in temperature (°C)

1

State the equation for mass

mass (kg) = Change in energy (J) / (specific heat capacity (J/Kg°C) x change in temperature (°C) )

mass (kg) = specific heat capacity (J/Kg°C) x change in temperature (°C) / Change in energy (J)

mass (kg) = Change in energy (J) x specific heat capacity (J/Kg°C) / change in temperature (°C)

1

State the units for specific heat capacity

Joules per degree Celsius

Joules per kilogram

Joules per kilogram per degree Celsius

1

Define "specific heat capacity"

Amount of energy required to raise the temperature of one kilogram of the substance by one degree Celsius.

The amount of energy required to freeze one kilogram of the substance with no change in temperature

The amount of energy required to boil one kilogram of the substance with no change in temperature

The energy needed for a substance to change state

1

Define "latent heat"

Amount of energy required to raise the temperature of one kilogram of the substance by one degree Celsius.

The amount of energy required to freeze one kilogram of the substance with no change in temperature

The amount of energy required to boil one kilogram of the substance with no change in temperature

The energy needed for a substance to change state

1

Define "specific latent heat of vaporisation"

Amount of energy required to raise the temperature of one kilogram of the substance by one degree Celsius.

The amount of energy required to freeze one kilogram of the substance with no change in temperature

The amount of energy required to boil one kilogram of the substance with no change in temperature

The energy needed for a substance to change state

1

Define "specific latent heat of fusion"

Amount of energy required to raise the temperature of one kilogram of the substance by one degree Celsius.

The amount of energy required to freeze one kilogram of the substance with no change in temperature

The amount of energy required to boil one kilogram of the substance with no change in temperature

The energy needed for a substance to change state

1

Equation for specific latent heat.

E = m x L

E = m + L

E = m / L

1

What does a flat section on a heating and cooling graph represent?

a change of state

a temperature increase

a temperatue decrease

an energy change

1

Describe the motion of particles in a gas.

particles vibrate

particles slide over each other

particles move freely in all directions

1

Describe the arrangement of particles in a liquid - choose 2

regular arrangement

irregular arrangement

particles are spread out

particles are touching