Question

Pc13 is a compound used to make pesticides. A reaction requires that 96.7 kg of pc13 be raised from 31.7 degrees celcius to 69.2 deree celcius. How much energy will this require given that the specific heat of pc13 is o.874 j/kg degree celcius

Answer 1

Energy required = 3169.34 Joules.

Step-by-step explanation:

The quantity of energy (Q) required can be determined by;

Q = mcΔθ

Where: m is the mass, c is the specific heat and Δθ is the change in temperature.

But, m = 96.7 kg, c = 0.874 J/(kg
`^(o) C`),
`T_(2)` =
`69.2^(o)` and
`T_(1)` =
`31.7^(o)`.

So that,

Q = mc(
`T_(2)` -
`T_(1)`)

= 96.7 x 0.874 x (
`69.2^(o)` -
`31.7^(o)`)

= 96.7 x 0.874 x 37.5

= 3169.3425

Q = 3169.34

= 3.2 KJ

The amount of energy required is 3169.34 Joules.