Question

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?

Answer 1

2415 J

Explanation:

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

Here,

Mass `(m) = 150g`
Specific heat capacity `(c) = (0.46J)/(gK)`
Initial Temperature = `25^@C`
Final Temperature = `60^@C`
`DeltaT=60-25=35^@C=35K`

Therefore, total heat supplied = `DeltaE` = `mcDeltaT`
`= 150 * 0.46 * 35` J
`= 2415` J