Heat and Specific Heat

The temperature of a 6.0 g sample of glass changed from 20.0°C to 45.0°C when it absorbed 550 J of heat. What is the specific heat of this glass?

• 0.27 J/g °C

• 3.7 J/g °C

• 130 J/g °C

• 12 J/g °C

Tags

NGSS.HS-PS3-4

How much heat is needed to change 12 grams of ice at 0 ºC to 12 grams of water at 0ºC?

• Q = 12 x 4.18 x 0

• Q = 12 x 334

• Q = 12000 x 334

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NGSS.HS-PS3-4

NGSS.HS-PS3-1

The specific heat is the amount of energy needed to raise the temperature one degree Celsius of 1 gram of a substance.

• True

• False

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NGSS.HS-PS3-4

Water has a specific heat of 4184 J/KgºC. Wood has a specific heat of 1760 J/KgºC. What material needs more energy to raise the temperature 1ºC

• Wood

• Water

• Both are the same

In which region(s) of the graph would we use a specific heat capacity(C) to calculate heat energy?

• Region 1, 3, & 5

• Region 2 & 4

• Region 1 only

• Region 1 & 2

Tags

NGSS.HS-PS3-1

In which region of the graph would use the Heat of vaporization(ΔH_vap) to calculate heat energy?

• Region 2

• Region 3

• Region 4

• Region 5

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-2

What is Specific Heat?

• The amount of thermal energy required to increase the temperature of 1 g of a material by 1 degree Celsius.

• The amount of radiant energy required to increase the temperature of 1 g of a material by 1 degree Fahrenheit.

• The amount of energy required to increase the temperature of 1 kg of a material by 1 degree Kelvin.

• The amount of friction required to increase the temperature of 1 kg of a material by 1 degree.

The unit(s) for specific heat is/are

• J

• g

• ℃

• J/g℃

Using the heat equation, what would the formula look like if we were solving for specific heat?

• q=mcΔT

• q=c/mΔT

• c=qmΔT

• c=q/mΔT

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

Which direction will the heat flow while this person holds a hot cup of tea?

• from the cup to her hand

• from her hand to the cup

• no heat is transferred

Tags

NGSS.HS-PS3-4