Heat

Heat transfers from ______ objects to cold objects. 

• Cold
• Hot
• Convection
• Radiation 

Tags

NGSS.MS-PS3-3

What type of heat transfer happens in liquids and gases?

• Conduction
• Convection
• Radiation

What  is the formula to calculate heat energy required to raise the temperature of any substance?

• Q = m Cp ∆T
• Q = m Cp
• Q =  ½ m v
• m = Q Cp

Tags

NGSS.MS-PS1-4

NGSS.MS-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

Tags

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-PS3-5

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

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

• True
• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?

• 12.82 °C
• 24.12°C
• 351 °C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4