how much heat energy is needed to change 100 g of ice at 0 ⁰C to water at 30 ⁰C?.
1 Answer
Explanation:
We use the specific heat equation, which states that,
where:
#q# is the heat energy supplied in joules
#m# is the mass of the substance
#c# is the specific heat capacity of the substance, which is#(4.186 \ "J")/("g" \ ""^@"C")# for water
#DeltaT# is the change in temperature
So, we get:
But then, we also need to change the ice to water first, and so we can use the latent heat formula, which states that,
- L# is the latent heat of fusion, vaporization, etc. of the substance
Here, we try to melt ice, so we use
So, the total energy required is: