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nydimaria [60]
3 years ago
7

A hot metal is placed in 100.0 g sample of water and it causes the temperature of the water to increase from 25 C to 27 C. How m

any joules of energy did the water absorb from the metal?
Chemistry
1 answer:
Arisa [49]3 years ago
5 0

Answer: 836.8\ J

Explanation:

Given

Mass of water in the sample is m=100\ g

Temperature changes from 25^{\circ}C to 27^{\circ}C

Change in temperature is \Delta T=27-25=2^{\circ}C\ \text{or}\ 2\ K

We know, specific heat of water is c=4.184\ J/g-K

Heat absorbed is given by

\Rightarrow Q=mc\Delta T\\\Rightarrow Q=100\times 4.184\times 2\\\Rightarrow Q=836.8\ J

Thus, water absorbs 836.8\ J of heat from hot plate.

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Explanation:

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In the given question we need to convert 0.075 meter into centimeter. For this purpose we need to know the relation between meter and centimeter. Then only this problem can be solved and the correct answer reached.
Now we know that
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0.075 meter = [(100/1) * 0.075] centimeter
We know that any number when divided by 1 gives the same number.
So
0.075 meter = (100 * 0.075) centimeter
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