# The specific heat of iron is 0.46 J/gC. How many joules will it take to make the temperature of a 150 g bar go up from 25 C to 60 C?

Jun 5, 2017

2415 J

#### Explanation:

We know, Heat Absorbed or Evolved by a substance = mass * specific heat capacity * change in temperature.

Here,

Mass $\left(m\right) = 150 g$
Specific heat capacity $\left(c\right) = \frac{0.46 J}{g K}$
Initial Temperature = ${25}^{\circ} C$
Final Temperature = ${60}^{\circ} C$
$\Delta T = 60 - 25 = {35}^{\circ} C = 35 K$

Therefore, total heat supplied = $\Delta E$ = $m c \Delta T$
$= 150 \cdot 0.46 \cdot 35$ J
$= 2415$ J