THERMAL CAPACITY

THERMAL CAPACITY

Block 2

Multiple Choice

The specific heat capacity of water is 4200J/kgºC. Calculate the thermal capacity of 3kg of water.

• 1260 J/ºC

• 1260 J/kg

• 12600 J/ºC

• 12600 J/kg

Multiple Choice

The specific heat capacity of water is 4200J/kgºC. Calculate the temperature change when 150kJ of energy is given to 3.0kg of water.

• 0.012 ºC

• 11.9 ºC

• 50ºC

Poll

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summary of thermal capacity

Multiple Choice

Which is the sum of the kinetic and potential energies of an object?

• Heat energy

• Specific heat capacity

• Thermal energy

• Temperature

Multiple Choice

Temperature is a measure of the...

• total energy in a substance
• total kinetic energy in a substance
• average potential energy in a substance
• average kinetic energy of molecules in a substance

Multiple Choice

If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________

• one reaches a temperature of zero
• they both have an equal temperature
• one runs out of energy

Multiple Choice

The heat absorbed by melting a solid is known as

• heat of fusion

• heat of solid

• heat of liquid

• heat of vaporization

Multiple Choice

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

Multiple Choice

How much energy is needed to raise the temperature of 5.0 grams of lead from 25°C to 35°C? [specific heat (c) = 0.129 J/(g•°C)]

• 6.45 J/(g•°C)

• 6.45 J

• 16.1 J/(g•°C)

• d.16.1 J

Multiple Choice

How much energy is needed to raise the temperature of 5.0 grams of lead from 25°C to 35°C? [specific heat (c) = 0.129 J/(g•°C)]

• 6.45 J/(g•°C)

• 6.45 J

• 16.1 J/(g•°C)

• d.16.1 J

Multiple Choice

If I heat up 2 pans of water one has 100 mL in it and one has 1000mL. Which one heats up the fastest?

• 100 mL
• 1000 mL
• They both heat up at the same speed
• They cool down.

Multiple Choice

A liquid X of mass 1 kg requires 3800 J of heat to raise its temperature by 1⁰C.

Calculate the total heat required to raise the temperature of 1 kg of liquid X by 3⁰C.

• 3800 J

• 7600 J

• 11 400 J

Multiple Choice

This equation is often used to solve problems related to heat and temperature change of a substance.

• change in energy = mcΔT

• energy = ml

Multiple Choice

The specific heat capacity of a substance is the quantity of heat required to

• melt 1 kg of the substance.

• raise the temperature of the substance by 1⁰C.

• raise the temperature of 1 kg of the substance by 1⁰C.

Multiple Choice

Temperature difference of 1 degree Celsius equivalent to a difference of

• 1 K.

• 100 K.

• 272 K.

• 274 K.

Multiple Choice

A metal has a specific heat capacity of 360 J / (kg ⁰C). An object made of this metal has a mass of 2.0 kg.

What is the thermal capacity (heat capacity) of the object?

• 180 J / ⁰C

• 180 J / kg

• 720 J / ⁰C

• 720 J / kg

Multiple Choice

Which statement defines the thermal capacity (heat capacity) of a solid body?

• the energy needed to melt the body without a change in temperature

• the energy needed to raise the temperature of the body by one degree Celsius

• the increase in the volume of the body when its temperature is raised by one degree Celsius

• the total amount of internal energy in the body

Multiple Choice

When a body absorbs heat, its temperature will

• increase.

• decrease.

• remains constant.