# Homework Help: The total quantity of heat received by the soup

1. Jun 17, 2012

### mms0101

1. The problem statement, all variables and given/known data
frozen soup of a mass of 0,40kg enters a microwave at -15°C. after 6 minutes the soup eaches a ° of 75°C
SHC of soup at solid state : c = 2100J/kg°C
SHC of liquid soup : c = 4200K/kg°C
SLH of fusion of soup : Lf = 330 000J/kg
melting point of soup : 0°C
THE QUESTION : WHAT IS THE TOTAL QUANTITY OF HEAT RECEIVED BY THE SOUP ?

2. Relevant equations
E = mcΔt
E= mL

3. The attempt at a solution
E = mcΔT
= 0,4 x 2100 x 15
=12600 J

E = mL
= 0,4 x 330 000
=132000J

E = mcΔT
= 0,4 x 4200 x 75
=126000

Etot = 132,000 + 12600 + 126000
=270600 J

teachers answer : 2 671 000 J
i have no idea how to get to it i am in my 5th year at the european school
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Jun 17, 2012

### Ratch

mms0101,

Ratch

3. Jun 18, 2012

### rude man

You're right, teach is wrong. Sure that was his answer?

4. Jun 18, 2012

### mms0101

ill go talk to him tomorrow as i have another answer to do with circuits that mismatch his ill let you know :) thank you anyway