1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Temperature and heat matter!

  1. Apr 11, 2012 #1
    1. The problem statement, all variables and given/known data

    Calculate the amount of heat to be added to warm 150g of ice from -10celsius to produce steam at 110C?

    2. Relevant equations

    I believe some relevant equations would be :
    Q= mcdeltat
    Q= mlf

    I also have some values as:

    Cice= 0.5 Cal/gcelsius
    Lf= 80 Cal/g

    C water= 1.0 Cal/gC

    Steam= 0.5cal/gC
    Lv = 540cal/g

    3. The attempt at a solution

    My attempt is wrong. I just know the answer, but I want to learn how to get to it. Thank you all in advance!
     
  2. jcsd
  3. Apr 11, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    hi domyy! :wink:

    show us your full calculations, and then we'll see what went wrong, and we'll know how to help! :smile:
     
  4. Apr 11, 2012 #3
    What did is wrong. I tried something simple but there's probably more that I do not know.
    I did:

    Q = 150g . 0.5 Cal/gC. 100C = 7500

    Also tried,

    Q= mlf = 150g . 80 Cal/g = 12,000

    But I know the answer is 109.5 kcal.
     
  5. Apr 11, 2012 #4

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    sorry, i can't follow that

    you seem to have left some things out

    can you please write it out properly?
     
  6. Apr 11, 2012 #5
    Q = 150g x 0.5cal/gC x 100C = 7500

    C= Celsius

    Q = mLf = 150g x 80 Cal/g = 12,000

    But it's wrong. The answer is 109.5 kcal. I need to know the formulas or steps I am missing. The problem is more than that. I believe I am supposed to find several values through equations and sum them.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Temperature and heat matter!
  1. Temperature and Heat (Replies: 1)

  2. Temperature and Heat (Replies: 2)

  3. HEat and Temperature. (Replies: 1)

  4. Temperature & Heat (Replies: 6)

  5. Heat and Temperature (Replies: 3)

Loading...