• Support PF! Buy your school textbooks, materials and every day products Here!

Water to Steam Energy Question

  • Thread starter hackz
  • Start date
1
0
1. Homework Statement

How much energy does it take to transform 500 g (0.5kg) of liquid water at 20 oC to steam at 100 oC? Note that the specific heat capacity of liquid water is 4.28x10^3 J/Kg/oC and the latent heat of vaporization for water is 2.3x10^6 J/Kg.

2. Homework Equations
Eh=mct ; m1c1t1=-m2c2t2 ; Eh = mLf ; Eh= mLv


3. The Attempt at a Solution

no clue..please help..
 

Answers and Replies

Chi Meson
Science Advisor
Homework Helper
1,766
10
Two steps. first the water needs to be heated to 100 C, then the water has to evaporate. Both steps involve heat going into the water. Which two of those 4 equations do you need?

By the way, in the first and second equation you list, it is not "T" but "change in T." (The triangle, "delta," means "change in...")
 

Related Threads for: Water to Steam Energy Question

Replies
2
Views
15K
  • Last Post
Replies
8
Views
2K
Replies
1
Views
812
  • Last Post
Replies
1
Views
5K
  • Last Post
Replies
6
Views
16K
  • Last Post
Replies
14
Views
4K
Replies
1
Views
524
  • Last Post
Replies
1
Views
499
Top