3 years ago

In the chemical equation 2Mg(s) + O2(g) ? 2MgO(s),

Chemistry

1 answer:

cluponka [151]3 years ago

4 0

The correct answer is D

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10.0 grams of water are heated during the preparation of a cup of coffee 1.0x 103 j of the heat are added to the water. which is

nirvana33 [79]

<u>Answer:</u> The final temperature of the coffee is 43.9°C

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To calculate the final temperature, we use the equation:

$q=mC(T_2-T_1)$

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q = heat released = $1.0\times 10^3J=1000J$

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C = specific heat capacity of water = 4.184 J/g°C

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$T_1$ = initial temperature = 20°C

Putting values in above equation, we get:

$1000J=10.0g\times 4.184J/g^oC\times (T_2-20)\\\\T_2=43.9^oC$

Hence, the final temperature of the coffee is 43.9°C

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