Specific Heat

What unit do you use to measure Thermal Energy?

• J/Kg ºC
• Kg
• ºC
• J

Tags

NGSS.HS-PS3-2

What is the symbol for Specific Heat

• Q
• t
• m
• C

What is the equation to measure change in Thermal Energy?

• Q = m c ∆t

• Q = m c

• Q = ∆m c t

• m = Q C

Tags

NGSS.HS-PS3-4

Object X has a specific heat of 2.45 J/g⁰C and object Z has a specific heat of 5.82 J/g⁰C. Which object will heat up slower?

• Object X, it has a lower spefici heat
• Object Z, it has a lower specific heat
• Object X, it has a higher specific heat
• Object Z, it has a higher specific heat

Tags

NGSS.HS-PS3-4

Graphite has a specific heat of 0.709 J/g⁰C. If a 20 gram piece of graphite is cooled from 38⁰C to 18⁰C, how much energy was lost by the graphite?

• 283.6 J
• 183.6 J
• 203 J
• 109 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

20 g of water. specific heat of water is 4.18 J/x°C. 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

Which has a higher specific heat capacity, water or sand?

• Sand
• Water
• They both have the same specific heat capacity.

Tags

NGSS.HS-PS3-4

A 9.5 kg outdoor copper structure heats up during the day from 24 degrees C to 78 degrees C. How much energy was absorbed? Note: copper has a specific heat of 390 J/kg C

• 100,000 J
• 247,000 J
• 200,070 J
• 235,000 J

Tags

NGSS.HS-PS3-1

Heat is measured in ___________

• Celcius

• Joules

• Grams

A pot of 2400g of water at a temperature of 25˚C is heated on a stove until the water boils (100˚C).  The specific heat of water is 4.18 J/(g˚C).
Determine the heat energy needed to heat the water in the pot to boiling.

• 133.76J
• 43,062.2J
• 752,400J
• 1,003,200J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4