Amount of energy rerquired to raise temperature

[chaotiiic]

Homework Statement

What amount of energy is required to raise the temperature of 12.0 kg of water
from 0 degrees Celsius to 25 degrees Celsius?

Homework Equations

Q = m*c*ΔT
1 calorie = 4.186J
specific heat capacity for water = 4.19x10^3

The Attempt at a Solution

Q = m*c*ΔT = (12kg)(4.19x10^3)(25°) = 1,257,000J
1257000J/4.186 = 300,286 calories

 

[gneill]

Homework Statement

What amount of energy is required to raise the temperature of 12.0 kg of water
from 0 degrees Celsius to 25 degrees Celsius?

Homework Equations

Q = m*c*ΔT
1 calorie = 4.186J
specific heat capacity for water = 4.19x10^3

The Attempt at a Solution

Q = m*c*ΔT = (12kg)(4.19x10^3)(25°) = 1,257,000J
1257000J/4.186 = 300,286 calories

Did you have a question about your method or result?

 

[chaotiiic]

Did you have a question about your method or result?

both.
another method i found online was to do (12000grams)*1cal/(g*K)*25 = 300,000 calories which is close to my first result. also i wasnt sure if the answer should be in joules or calories.

 

[gneill]

both.
another method i found online was to do (12000grams)*1cal/(g*K)*25 = 300,000 calories which is close to my first result. also i wasnt sure if the answer should be in joules or calories.

Both methods amount to the same thing. As for the units of the result, that depends upon who is asking the question and what units they expect the answer to be in The calorie is a unit of energy, as is the Joule.

 

[chaotiiic]

Both methods amount to the same thing. As for the units of the result, that depends upon who is asking the question and what units they expect the answer to be in The calorie is a unit of energy, as is the Joule.

ok thanks