How much heat is required to raise the temperature of 100 grams of water from, 25c to 82 c?

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21-08-2018
Chemistry

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How much heat is required to raise the temperature of 100 grams of water from, 25c to 82 c?

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tallinn tallinn · Answer 1 · 2018-08-30T11:47:25+02:00

Answer:- 23.8 kJ of heat is required to raise the temperature of water.

Solution:- We have been given with grams of water, it's initial and final temperature and asked to calculate the heat required to raise it's temperature. Here, lower degree C water is changing into higher degree C water. So, the formula used to calculate the heat is:

[tex]q=mc\Delta T[/tex]

Where, q is the heat energy, m is mass, c is specific heat of water and delta T is change in temperature.

m = 100 grams

[tex]\Delta T[/tex] = 82 - 25 = 57 degree C

[tex]c=4.184\frac{J}{g.^0C}[/tex]

q=?

Let's plug in the values in the formula and do the calculations:

[tex]q=100*4.184*57[/tex]

q = 23848.8 J or 23.8 kJ

So, 23.8 kJ of heat is required to raise the temperature of 100 g of water from 25 to 82 degree C.