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blsea [12.9K]
3 years ago
11

To make yourself some coffee, you put one cup of water (246 gg ) in a small pot on the stove. Part A What quantity of energy mus

t be transferred thermally to the water to raise its temperature from 20 ∘C∘C to 100 ∘C∘C?
Physics
1 answer:
Leya [2.2K]3 years ago
3 0

Answer:

The required heat energy is \bf{19680~cal}.

Explanation:

The heat energy 'Q' required to raise the temperature of water is given by

Q = M~s~\Delta \theta

where 'M' is the mass of water, 's' is the specific heat capacity of water and '\Delta \theta' is the change of temperature.

Given, M = 246 gm, \Delta \theta = (100^{0}~C - 20^{0}~C) = 80^{0}~C and we know that the specific heat capacity of water is s = 1~cal~gm^{-1}~^{0}C^{-1}.

Substituting the values in the above expression, the required heat energy is

Q = 246~gm \times 1~cal~gm^{-1}~^{0}C^{-1} \times 80^{0}~C = 19680~Cal

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