Chapter 4 Heat

There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?

• Large cup (Trenta)
• Small cup (Tall)
• Venti
• All three are the same temperature so they have same thermal energy

Tags

NGSS.HS-PS3-4

If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C? 

• -80,371.2 J
• 44,938.6 J
• 80,371.2 J
• 112,575.9 K

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of  0.10 J/g°C, what is the mass of the iron sample?

• 25 g
• 30 g
• 20 g
• 50 g

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the symbol for Thermal Energy?

• Q
• T
• m
• Cp

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

Tags

NGSS.MS-PS3-4

A high specific heat means...

• It heats up quickly with energy added
• It requires more energy to change temperature

Tags

NGSS.MS-PS1-4

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 of the metal?

• 1.17 J/g°C
• -1.17 J/g°C
• 0.857 J/g°C
• -0.857 J/g°C

Tags

NGSS.MS-PS3-4

A hot marble is dropped into a container of cool water.  Which of the following statements most accurately describes the molecular motion of molecules.

• Both the marble molecules and the water molecules will slow down until they eventually come to rest.
• The marble molecules will slow down while the water molecules speed up until they reach reach the same average kinetic energy.
• The marble molecules will speed up while the water molecules will slow down until they reach nearly identical speeds.
• Both the marble molecules and the water molecules will speed up until they reach nearly identical speeds.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Which of the following best describes absolute zero?

• The temperature at which water is at its triple point
• The temperature at which the molecules of a substance have maximum kinetic energy
• The temperature at which water freezes at standard pressure
• The temperature at which the molecules of a substance have minimum kinetic energy

Tags

NGSS.HS-PS3-2