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Molar and Specific Heat Capacity

How will the ...

Question

How will the temperature of $10.0 g$ of iron change if $45 J$ is added to the metal?
Iron has a specific heat of $0.45 J / (g^{o} C)$ .

+ 20^{o} C

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+ 10^{o} C

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+ 100^{o} C

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+ 1^{o} C

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Solution

The correct option is B $+ 10^{o} C$
$Q = n C △ T$
$Q = 45 J$ ; $n = 10.0 g$ ; $C = 0.45 J / g^{o} C$
Therefore, $45 = n C △ T$
$\Rightarrow \frac{45}{10.0 \times 0.45} = △ T$
$\Rightarrow 10 = △ T$

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