Question

The specific heat of ethylene glycol is 2.42J/g-K. How many J of heat are needed to raise the temperature of 62.0g of ethylene glycol from 15.2 C to 40.8 C?

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asked 2021-02-11
The specific heat of ethylene glycol is 2.42J/g-K. How many J of heat are needed to raise the temperature of 62.0g of ethylene glycol from 15.2 C to 40.8 C?

Answers (1)

2021-02-12
\(\displaystyle{s}={\frac{{{q}}}{{{m}\triangle{T}}}}\), so \(\displaystyle{q}={s}{x}{m}{x}\triangle{T}={\left({2.42}\ \frac{{J}}{{g}}-{K}\right)}{\left({62.0}\ {g}\right)}{\left({25.6}\ {K}\right)}={3.84}\times{10}^{{3}}\ {J}\)
(where \(\displaystyle\triangle{T}={40.8}{C}-{15.2}{C}={25.6}{C}\), but is equivalent to 25.6K as we are calculating the difference between the two temperatures \(\displaystyle{313.8}\ {K}-{288.2}\ {K}={25.6}\ {K}\))..
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