Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Math & Sciences (https://www.askmehelpdesk.com/forumdisplay.php?f=402)
-   -   How to calculate the quantity of heat absorbed with any substance? Is it a equation? (https://www.askmehelpdesk.com/showthread.php?t=194995)

  • Mar 15, 2008, 05:05 PM
    mark_ycb
    How to calculate the quantity of heat absorbed with any substance? Is it a equation?
    How to calculate the quantity of heat absorbed with any substance? Is it a equation?
  • Mar 16, 2008, 02:36 AM
    Capuchin
    What do you mean by "quantity of heat"?
  • Apr 19, 2008, 01:01 PM
    questhelper
    It's quite simple actually. The equation you need to use is q=mcΔT

    where q = quantity of heat in Joules (J)
    m = mass of the substance in grams (g) *remember that 1 mL = 1 g
    c = specific heat capacity
    (there are many different specific heat capacities for many different substances)
    water has a SHC of 4.18 and ice has 2.01, try and find a table for other substances
    ΔT = the change in temperature (always the highest temp minus the lowest)
    (T2-T1) (ex/ 32-12 = 20)
  • Jan 2, 2010, 04:25 PM
    helpmex123
    the accepted value for the energy content of a peanut is 30.2 kj per gram. The student measured 100.0 g of water into a metal can and placed the can on a ring stand. The peanut was attatched to a wire suspended under the can. The initial temp. of water was recoreded as 22.0 C. the peanut was ignited and allowed to burn. When the peanut finished burniing, the final water temp was 57.0 C. the students experimental value for the energy content of this peanut was 25.9 kj per gram.

    calculate the total amount of heat absorbed by the water in the given experiment.
    include a numerical setup and the calculated result.
  • Jan 2, 2010, 04:27 PM
    helpmex123

    Helpp please
  • Jan 4, 2010, 01:24 AM
    Unknown008

    You can use the explanation given by the previous poster.

    I'll re say it, just in case:



    Q is the amount of heat energy
    m is the mass of water
    c is the specific heat capacity of water (which is 4.18 J/(kgK))
    theta is the change in temperature of the water.
  • Mar 2, 2011, 09:06 PM
    jbwaren


    100*4.18*29-22
    =12100

  • All times are GMT -7. The time now is 02:44 PM.