How much heat in joules is needed to raise the temperature

[comoore]

Homework Statement

How much heat in joules is needed to raise the temperature of 7.0 L of water from 0°C to 78.0°C? (Hint: Recall the original definition of the liter.)

Homework Equations

How much heat in joules is needed to raise the temperature of 7.5 L of water from 0°C to 87.0°C? (Hint: Recall the original definition of the liter.)
2.73e+06 J

The Attempt at a Solution

I answered 2.28^06 J.
I have actually already asked this question on another forum, and they couldn't figure it out either. Please help.

 

[Greg Bernhardt]

Can you show us how you got to your answer?

 

[comoore]

I think so...

I did 7000 gm x 78 C=546000 calories
546000x4.184j/calorie=2284.5 kj
Then converted kj to j

 

[comoore]

OH. MY. GOSH. I didn't put the 10 in when I answered. The answer is correct. 2.28x10^6 J.

 

[haruspex]

7.0 L of water

7.5 L of water

Better turn off the tap.