Thursday, March 5, 2009

Textbook homework - heating curve regents questions 3.4.09

12 comments:

  1. i don't understand the graph on pg 438.....#10 and #12....can u please help me out???...



    -jess

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  2. Hey Jessica,
    We dont have tennis practice tomorrow :(
    Try not to cry!

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  3. Jessica why dont u just call me if u need help?

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  4. ..I tried to call but you dont answer

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  5. Pay attention for number eleven in the water molecule heat is being added and the way QS is on the graph it is being vaporized.Vaporization is when energy is required to overcome intermolecular forces and the temperature will be the same even if heat is being added.

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  6. And for And for number twelve, RS is being heated and I think fusion is occuring because the temp is still remaining the same as 100 degrees celcius and its a change from gas to liquid.

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  7. for question #7 on pg 438 ....what is happening to the average kinetic energy of the particles during segment BC?

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  8. and for #10.... we got to find the molar mass of each??

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  9. Girl i dont know but i think that as time and temperature increases and energy is being required the particles is melting and like the intermolecular bonds are being broken or something

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  10. This comment has been removed by the author.

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  11. L.J. repost your question in the new post for the lab please

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  12. Jessica for number 10, i dont think you have to find the molar mass for each. The question asks which one has the strongest intermolecular forces,and the graph shows the boiling point. Which ever one has the highest boiling point would have the strongest intermolecular forces because it has the highest temperature to change it another phase. So for the answer I got 1.HF, since the boiling point is 19.4

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