Energy Flow and Specific Heat

What is the equation to measure change in thermal energy?

• Q=mc∆t

• Q=mc

• Q= ∆mct

• m=QC

Copper, stainless steel, carbon steel, and zinc were all heated using the same amount of energy. What material would be have the lowest temperature after being heated?

• Copper

• Carbon Steel

• Zinc

• Stainless Steel

What does temperature measure?

• Heat
• ºC
• Kinetic Energy
• Thermal Energy

Tags

NGSS.HS-PS3-2

Which will change temperature the fastest?

• copper

• granite

• iron

• basalt

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down.

• They would stop moving.

• They would speed up.

• There would be no effect.

Graphite has a specific heat of 0.709 J/g⁰C. If a 20.0 gram piece of graphite is cooled from 38⁰C to 18⁰C, how much energy was lost by the graphite?

• 280 J

• 180 J

• 200 J

• 110 J

You have 20 g of water with specific heat of 4.18 J/g˚C. The temperature changes from 25° C to 20° C. How much heat energy (Q) moves from the water to the surroundings?

• 418 Joules

• 209 J

• 83 J

• 4.18 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

The temperature of an unknown piece of metal with a mass of 30.00 g changes from 25.0 °C to 35.0 °C when the metal absorbs 350.0 J of energy. What is the specific heat constant of the metal?

• 1.17 J/g°C

• -1.17 J/g°C

• 0.857 J/g°C

• -0.857 J/g°C

How many Joules of energy are required to change 10 gram of liquid water from 20.^o C to 90.^o C?

• 1400 J

• 2800 J

• 210,000 J

• 1,400,000 J

For a skillet, used for cooking, do you want a high or low specific heat

• High, so that it will need more energy to heat up
• Low, so that it will change temperature quickly

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4