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Heat Formula

Heat may be defined as energy in transit from a high temperature object to a lower temperature object. Heat is form of energy which produces the change in temperature in any substance. The heat is denoted by Q.

The Heat formula is given by
Where,
m is the mass of the body,
C is the specific heat,
$\Delta$ T is the temperature difference.

Heat formula is used to find the heat transfer, mass, specific heat or temperature difference if some of the quantities among these are given. Heat is expressed in Joules (J).

Related Calculators
Specific Heat Formula Calculator Heat Calculator
Heat Capacity Calculator Heat Transfer Calculator
 

Heat Problems

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Below are some problems based on Heat which may be helpful for you.

Solved Examples

Question 1: Calculate the heat needed to raise a half kg of iron from 270 C to 600 C?
Solution:
 
Given: Mass m = 0.5 Kg,
          Specific heat of iron C = 0.45 J/g0C,
          Temperature difference $\Delta$ T = 700C - 270C = 430C
The heat transfer is given by Q = m $\times$ c $\times$ $\Delta$ T
                                             = 0.5 Kg $\times$ 0.45 $\times$ 103 J/Kg0C $\times$ 430 C
                                             = 9.675 J.
 

Question 2: How much heat energy is lost if water having 2 Kg mass is cooled from 600C to 200C? (Specific heat of water C = 4.2 $\times$ 103 J/Kg0C)
Solution:
 
Mass of water m = 2 Kg,
Specific heat of water C = 4.2 $\times$ 103 J/Kg0C,
Temperature difference $\Delta$ T = - 400C
Heat energy is given by Q = m C $\Delta$ T = 2 Kg $\times$ 4.2 $\times$ 103 J/Kg0C $\times$ (-400 C)
                                                                = - 31.6 J.
 

More topics in Heat Formula
Specific Heat Formula Heat Transfer Formula
Heat Capacity Formula Newton's Law of Cooling Formula
Temperature Formula Kelvin to Celsius Formula
Celsius Formula Thermal Expansion Formula
Thermal Conductivity Formula Thermal Energy Formula
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