Some Thermochemistry

Find ΔS and ΔG for the conversion of 10.0g of supercooled water at -10° C and 1 atm to ice at -10° C and 1 atm. Average cp values for ice and supercooled water in the range 0° C and -10° C are 0.50 and 1.01 cal/(°C g) respectively. Given that the latent heat of fusion of ice is 79.7 cal/g at the normal boiling point.

6 comments:

  1. SumantraMarch 26, 2012 at 8:14 PM

    ΔS= -74.6 cal/° C and ΔG is equal to zero?

    ReplyDelete
  2. ShivankerMarch 28, 2012 at 11:01 AM

    i spot a silly mistake! :D

    ReplyDelete
  3. ABHISHEKApril 3, 2012 at 7:52 AM

    i did it like this !!

    ΔS total = ΔS(water[-10°C] to water[0°C]) + ΔS(water[0°C ]to ice[0°C]) + ΔS(ice [0°C ]to ice [-10°C]).....

    ΔS total = 10*(1.01)*ln (273/253) + (79.7 * 10) /273 + 10* 0.5 * ln(253/273)


    plz verify !!


    or spot the mistake !!

    ReplyDelete
  4. ShivankerApril 5, 2012 at 3:57 PM

    @Abhishek:

    1. its 263, not 253
    2. the second term should be negative as heat was released.. :)

    ReplyDelete
  5. ABHISHEKApril 6, 2012 at 7:54 AM

    okay okay !!

    thanx!!!

    ReplyDelete
  6. AnonymousJanuary 29, 2022 at 7:35 PM

    1xbet korean sports betting review, how to bet and odds
    1xbet korean sports betting review, how to bet and หาเงินออนไลน์ odds, casino 1xbet game, roulette table, live casino, live casino, casino 바카라 jackpot, poker tables.

    ReplyDelete

Subscribe to: Post Comments (Atom)