How much energy must be added to a 2kg piece of wood with a specific heat capacity of 1760 JkgoC to increase its temperature from 10oC to 50oC?

Answer 1

Its 900 joules to raise the temperature of 1Kg of the substance by a degree, and we have 2Kg, to heat out sample we need 1800 J to raise the temperature by one degree celsius.

we need to heat the sample by 40 degrees and if we need 1800 J per degree then

40 x 1800 = 72000 J needed. Or 72KJ

Answer 2

• The equation relating heat to specific heat capacity, where the unit quantity is in terms of mass is:

where Q is the heat put into or taken out of the substance, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.

• Where the unit quantity is in terms of moles, the equation relating heat to specific heat capacity (also known as molar heat capacity) is

where Q is the heat put into or taken out of the substance, n is the number of moles, c is the specific heat capacity, and ΔT is the change in temperature.

Answer 3

The specific heat capacity (SHC) of a material describes the energy in joules required to increase the temperature of 1kg of said material by 1 degree Celsius (or 1 Kelvin).

As such we need to know the mass of material (in this case 2 kg), the SHC (1760 Jkg-1K-1) and the temperature change (Delta T - whcih in this case is equal to 50-10 = 40 K).

Therefore the energy required to cause the tempreature change described equals:

Energy = Mass x SHC x Delta T

Energy (J) = 2 x 1760 x 40

This is equal to 140800 J or 140.8 kJ.

Answer 4

72,000 J apex

Answer 5

Thats 900 * 2 * 40 = 72000 joules

Answer 6

140,800 j

Answer 7

72,000 J