Specific Heat Capacity of a matter is defined as amount of
heat required to rise 1dgree Celsius of temperature of 1kg mass. If m is mass
of body, H is amount of heat absorbed by the body, dt is temperature difference
i.e. t_{2}-t_{1, }and s is specific heat capacity of body then,

H = msdt is the relation among them.

Q. If 2kg water is heated from 20-30 degree Celsius how much heat is absorbed by water ? given that specific heat capacity of water is 4200J/kg/degree Celsius

Answer: here, m = 2kg, dt = 30 -20 =10 degree Celsius s =4200

So, H = msdt = 2x4200x10 = 84,000J

Q. Mercury of specific heat capacity 140J/Kg^{0}C is
heated from 15^{0}C to 40^{0}C by applying heat of 17,500J,
what should be the mass of mercury?

Q. Mercury of specific heat capacity 140J/Kg^{0}C is
heated from 15^{0}C to 40^{0}C by applying heat of 17,500J,
what should be the mass of mercury?

Here, m = ?

S = 140J/Kg^{0}C

dt = 40 – 15 = 25^{0}C

H = 17,500J

We know, msdt = H

Or, mx140x25 = 17,500

0r, m =17,500/3500

Therefore m = 5Kg

Q. If 10Kg sand requires heat of 1.6x10^{5}J to
rise its temperature from 14^{0}C to 34^{0}C, find specific heat
capacity of sand. (left for students, answer in comment)

Q. Why water is used as cooling agent?

Ans: Water is cheap, abundant and it has higher value of specific heat capacity. So it is used as colling agent.

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