Heat and Specific Heat

Calculate the amount of heat required to raise the temperature of 50g of water from 20°C to 50°C. (Specific heat capacity of water is 4.18 J/g°C)

• 6270 J

• 4186 J

• 3200 J

• 7500 J

Tags

NGSS.MS-PS3-4

A piece of metal with a mass of 100g is heated from 20°C to 80°C. If the specific heat capacity of the metal is 0.5 J/g°C, calculate the amount of heat absorbed by the metal.

• 2500 J

• 3000 J

• 1500 J

• 3500 J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Calculate the final temperature when 500J of heat is added to 200g of aluminum at an initial temperature of 25°C. (Specific heat capacity of aluminum is 0.897 J/g°C)

• The final temperature is 28.06°C

• The final temperature is 30.5°C

• The final temperature is 27.9°C

• The final temperature is 26.8°C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How does specific heat capacity affect the rate at which a substance heats up or cools down?

• Specific heat capacity has no impact on the rate of heating or cooling

• Specific heat capacity affects the rate at which a substance heats up or cools down by determining how much heat energy is needed to change its temperature.

• Higher specific heat capacity leads to faster heating

• Specific heat capacity determines the color of the substance

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Explain the concept of specific heat capacity and why different substances have different values for it.

• Specific heat capacity is the same for all substances

• Different substances have the same molecular structure

• Variations in specific heat capacity are solely due to temperature changes

• Specific heat capacity is the amount of heat energy required to raise the temperature of a unit mass of a substance by 1 degree Celsius. Different substances have different values for specific heat capacity due to variations in their molecular structure and composition.

A 50g piece of iron at 100°C is placed in 200g of water at 20°C. If the final temperature of the system is 30°C, calculate the specific heat capacity of the iron. (Specific heat capacity of water is 4.18 J/g°C)

• 1.26

• 0.84

• 2.10

• 0.42

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Why is it important to consider specific heat capacity when designing systems that involve heat transfer?

• Specific heat capacity determines how much heat energy a substance can absorb or release for a given temperature change, aiding in efficient heat transfer calculations.

• Specific heat capacity has no impact on heat transfer efficiency

• Specific heat capacity is a constant value for all substances

• Specific heat capacity is only relevant for solid materials, not liquids or gases

Tags

NGSS.HS-PS3-4

If a material has a high thermal conductivity, what does that indicate about its ability to conduct heat?

• It indicates that the material is a good insulator of heat.

• It indicates that the material is transparent to heat.

• It indicates that the material absorbs heat quickly.

• It indicates that the material can efficiently conduct heat.

Tags

NGSS.MS-PS3-3

What are the three main mechanisms of heat transfer?

• Absorption

• Conduction, Convection, Radiation

• Insulation

• Reflection

If the specific heat of water is 4.18 J/g∙°C, how much heat is required to increase the temperature of 1,200 g of water from 23 °C to 39 °C?

• -80,256 J

• 80.256 J

• 80,256 J

• -80.256 J

Tags

NGSS.MS-PS3-5