Question

how much heat energy in joules is necessary to raise the temperature of 5 kg of water from 20 degree to 1000 degree ​

Answer 1

$\huge\underline\blue{\sf Answer:}$

$\red{\boxed{\sf Heat\: Energy (Q)=21001.4KJ}}$

$\huge\underline\blue{\sf Solution:}$

$\large\underline\pink{\sf Given: }$

• Mass of water (m) = 5kg or 5000g

• Temperature $\sf{(T_1)=20°C}$

• Temperature $\sf{(T_2)=1000°C}$

$\large\underline\pink{\sf To\:Find: }$

• Heat energy (Q) = ?

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We know,

$\large{\boxed{\sf Q=mc\triangle T }}$

c = Specific heat

The specific heat capacity of the material, c . This is the amount of heat required to raise 1 gram of that substance by 1°C.

For water Specific heat (c) = 4.186J/g°C

On Putting value :

$\large\implies{\sf Q=5000×4.186×(1000-20) }$

$\large\implies{\sf Q=5000×4.186×980}$

$\large\implies{\sf Q=21001400}$

$\large\implies{\sf Q=21001.4KJ}$

$\red{\boxed{\sf Heat\: Energy (Q)=21001.4KJ}}$