Hello, Chloe,
We need the specific heat of water. There are several values that can be used, all equivalent, but with different units. I'll use 4.184 J/g*K.
This unit of specific heat says that if we add 4.184 Joules to 1 gram of water, it will raise it's temperature by 1 degree Kelvin. The temperature change of 8.9oC is also 8.9oK.
We can now calculate the heat we need by using the following expression:
q = C*M*(DT), where q is the heat/energy, C the specific heat, M the mass, and DT the temperature change (Delta T).
q = (4.184 J/g*K)*(780g)*(8.9K)
q = (4.184 J/g*K)*(780g)*(8.9K)
q = 29418 Joules, or 2.94 kJ
Bob
Robert S.
tutor
Joules is the SI unit for energy. 1 Joule is 1 Newton per square meter. The English equivalent is the calorie and Calorie (yes, one with a small and one with a large "c"). What did you want broken down? The explanation of the Joule? Or something else? - Bob
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06/06/21
Chloe D.
What is joules? And can you break that down a little more for me?06/06/21