Question

2.0 kg of carbon is heated from 25°C to 55°C, and absorbs 42600 joules of heat in the process.

Answer 1

Answer: c = 710 J/kg°C or 0.71 J/g°C

Explanation: Heat is expressed in the formula Q = mc∆T. Derive to find the specific heat c. So the formula will become c = Q / m∆T

c = Q / m∆T

= 42600 J / 2 kg ( 55°C - 25°C )

= 710 J /kg°C

Or can be expressed by converting kg to g.

c = 0.71 J /g°C

Answer 2

Answer:

The heat capacity of carbon is 710 J/kg°C

Explanation:

Given;

Mass (m) = 2.0 Kg

T₁ = 25°C , T₂ = 55°C       ∴ Θ = T₂ - T₁ = 55°C - 25°C ==> 30°C

Energy absorbed (E) = 42,600 J

Heat Capacity (C) = ?

heat equation => E = m*C*Θ

Making "c" the subject, the equation becomes

C = E / mΘ

C = $\frac{42,600}{2 (30)}$

C = 710 J /kg°C