Question

heat energy necessary to raise the temperature of 5 kg of water from 20 degree Celsius to 100 degree celsius is

a.750 kcal
b.800 kcal
c.400 kcal
d.450 kcal

Answer 1

As-Salamu-Alykum


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Mass of water =5kg


Delta T = T2 _ T1


Delta T = 100_20=80°C


We know that specific heat capacity of water is 1kcal .


We have an equation ....


Q= m × C × DeltaT


Q is heat


C is specific heat of that material here it is water


Delta T is temperature change


Q = 5 ×1×80


Q = 400 kcal


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INSHALLAH it will help U

Answer 2

heat energy necessary to raise the temperature of 5 kg of water from 20 degree Celsius to 100 degree celsius is

a.750 kcal
b.800 kcal
c.400 kca✅✅✅
d.450 kcal