Question

How much energy must be added to a 2-kg piece of wood with a specific heat

Answer 1

Answer:

A. 140,800 J

Explanation:

Specific heat of a material is defined as the amount of energy required to increase in 1°C 1kg of the material. For wood there are required 1760J perkg per °C.

The equation is:

Q = C*m*ΔT

Where Q is heat in Joules,

C is specific heat (1760J/kg°C),

m is mass (2kg)

ΔT is change in temperature (50°C - 10°C = 40°C)

Replacing:

Q = 1760J/kg°C*2kg*40°C

Q = 140800J

Right option is:

A. 140,800 J