Question

What mass of silver can 2 kJ of energy raise 15°C?

Answer 1

0.0018 grams is the mass of silver can 2 kJ of energy raise 15°C.

Explanation:

Data given:

heat supplied (q) = 2KJ or 2000 J

cp of silver= 0.24 j/gram °C  (specific heat capacity is the amount of heat required to raise the temp of substance by 1 degree)

temperature = 15 degree centigrade

mass=?

using the equation  for the heat capacity,

q= mcpT

m = $\frac{cp T}{q}$

Putting the values in the equation:

    = $\frac{0.24.15}{2000}$

    = 0.0018 grams is the mass of silver in which 2 kJ of energy raise temperature by 15°C.