Energy Calculations

Which material heats up quickest?

• Aluminium

• Concrete

• Diamond

• Glass

• Water

Tags

NGSS.MS-PS1-4

Some 1kg of water and 1kg of diamond are heated to the same temperature. Which is true?

• They both require the same amount of energy

• The diamond needs around 8 times more energy

• The water needs about 8 times more energy

• The diamond heats up slower than the water

• The water ends up colder

Tags

NGSS.HS-PS3-4

10 kg of aluminium is heated from 120C to 220C. How much energy is needed?

• 8 970 000 J

• 897 J

• 8970 J

• 89 700 J

• 897 000J

Tags

NGSS.HS-PS3-1

What are the units for specific heat capacity?

• J kg / °C

• J / kg / °C

• J / °C

• J / kg

• kg °C / J

What is happening between B and C?

• Melting

• Boiling

• Condensing

• Freezing

• Sublimation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What does section B show?

• Melting

• Boiling

• Condensing

• Freezing

• None of these options

Tags

NGSS.MS-PS1-4

What does section D show?

• Melting

• Boiling

• Condensing

• Freezing

• None of these options

Tags

NGSS.MS-PS1-4

Latent heat is

• the heat absorbed or released at a boiling process during a change of phase

• the heat absorbed or released at a constant temperature during a change of phase

• the heat absorbed or released at a constant temperature during a change of phase of 1 kg object

• the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Water molecules have the greatest kinetic energy in

• Ice at 0 ⁰C

• Water at 90 ⁰C

• Water at 373 K

• Steam at 150 ⁰C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How much energy is required to change 5 kg of ice at 0  $\degree$ C into water at the same temperature? (latent heat of fusion is 3.36 X $10^6$ J/kg )

• 16.1 X $10^6$ J

• 16.8 X $10^6$ J

• 15.1 X $10^6$ cal

• 16.8 X $10^6$ cal