Specific heat/ Calorimetry

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-PS3-4

NGSS.MS-PS1-4

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-PS3-4

NGSS.MS-PS1-4

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-PS3-4

NGSS.MS-PS1-4

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-PS3-4

NGSS.MS-PS1-4

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-PS3-4

NGSS.MS-PS1-4

What is the symbol for Thermal Energy?

• Q
• T
• m
• Cp

Tags

NGSS.HS-PS3-4

The symbol for specific heat is .......

• Cp
• Q
• m
• T

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

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

NGSS.MS-PS1-4

The first law of thermodynamics states that:

• energy can be created.

• energy can be destroyed.

• energy can neither be created nor destroyed

Tags

NGSS.HS-PS3-1