Question

How much energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C?

Answer 1

1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C

Step-by-step explanation:

Crayon is paraffin wax. The specific heat of paraffin wax is 2.14 J/g°C

As we know

`Q = m*c *\Delta T`

Where

`\Delta T` is the change in temperature
`T_2- T_1`

m is the mass of the object

c is the specific heat in J/g°C

Substituting the given values, we get -

`Q = 30 * 2.14 *(49-25)\\Q = 1540.8` Joules

1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C