Heat Problems 2021

A material was cooled from 100ºC to 40ºC. What is the temperature change? (Remember: Change in temperature =  T final - T initial )

• 60ºC

• 40ºC

• -60ºC

• -40ºC

Tags

NGSS.MS-PS3-4

The amount of energy required to raise the temperature of 1 gram of a substance by 1°C is called __________.

• Thermal Energy

• Specific Heat

• Temperature

• Kinetic Energy

How does heat flow?

• Always from cold to warm
• Always from warm to cold
• Both warm to cold & cold to warm
• It depends on the temperature

Tags

NGSS.HS-PS3-4

How many Joules of heat energy are required to heat 10 grams of water from 20 °C to 90 °C? (The formula is on your paper.)

• 1476 J

• 2926 J

• 210,050 J

• 1,404,500 J

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

How much heat energy is given off the the environment when 20 g of water drops in temperature from 25° C to 20° C? (The formula is on your paper.)

• - 418 Joules

• 209 J

• - 83 J

• 4.18 J

Tags

NGSS.HS-PS3-4

Water has a specific heat of 4.18 J/gºC. Wood has a specific heat of 1.7 J/gºC. Which material, water or wood, needs more energy to raise 1 gram of the substance by 1ºC?

• Wood

• Water

• Both are the same

In heat calculations, what does the triangle  $\Delta$   represent?

• distance

• energy

• mass

• change in

Which substance requires the least amount of heat energy to heat 10 g of the substance 5 °C?

• gold

• copper

• ice

• water

Tags

NGSS.HS-PS3-4

Which substance requires the most heat energy to heat 10 g of the substance 5 °C?

• gold

• copper

• ice

• water