Determine the Heat Considering the Specific Heat Mass and Temperature

Specific heat of water is  4.18 J/g°C. Specific heat of wood is 1.760 J/g°C What material needs more heat energy to raise the temperature?

• Water
• Wood
• Both are same

___________ is measured by the unit Joules.

• Heat energy
• Temperature
• Specific heat

Tags

NGSS.HS-PS3-4

What  is the formula to calculate heat energy required to raise the temperature of any substance?

• Q=mc∆t
• Q=mc
• Q= ½mv
• m=QC

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

• c
• Q
• m
• t

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

The heat capacity of a substance depends on the followings, EXCEPT:

• mass of substance.

• type of substance.

• Quantity of heat supplied.

• ice point and steam point.

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

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.

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

Tags

NGSS.HS-PS3-1

The time taken by an electric heater to raise the temperature of 4 kg of water from 25⁰C to 30⁰C is 1 minute. If the specific heat capacity of water is 4200 J kg^{-1 o}C^-1, calculate the power of the heater.

• 70 W

• 140 W

• 700 W

• 1400 W

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4