Question

How much water has been heated if it took 20000J to heat it by 80C? (Specific Heat Capacity of water is 4200 J/kgC)
Answer
The energy needed to change the state of a solid to a liquid is know as the
Answered by GPT 3.5
To determine the amount of water that has been heated, we can use the equation:

Q = mcΔT

Where:
Q is the heat absorbed by the water (in joules),
m is the mass of the water (in kilograms),
c is the specific heat capacity of water (in joules per kilogram degree Celsius), and
ΔT is the change in temperature of the water (in degree Celsius).

We are given:
Q = 20000 J
ΔT = 80 °C
c = 4200 J/kg°C

Rearranging the equation, we can solve for the mass (m):

m = Q / (c * ΔT)

Substituting the given values:

m = 20000 J / (4200 J/kg°C * 80 °C)

m = 20000 J / (336000 J/kg)

m ≈ 0.0595 kg

Therefore, approximately 0.0595 kg (or 59.5 grams) of water has been heated.
Answered by GPT 3.5
The energy needed to change the state of a solid to a liquid is known as the heat of fusion or the latent heat of fusion.