What is the amount of energy needed to heat 55.0 g of water from 45°C to 67°C?

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Answer 1 · 2017-04-05T02:11:17

5.8 kJ

Use the equation,

$Q=mcdeltaT$

where Q is heat flow (energy), m is mass, c is specific heat capcity and $deltaT$ is the change in tempreture ( $T2-T1$ )

The specific heat capacity of water is $(4.816J/(g*C))$

$Q=(55.0 g)*(4.816J/(g*C))*(67 C -45C)$

Solve and the answer is,

5,827 J or 5.827 kJ

To 2 significant digits,

5.8 kJ