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Topic: phase change practice with other variables  (Read 19038 times)

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Offline ARGOS++

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Re: phase change practice with other variables
« Reply #30 on: February 05, 2009, 05:59:31 PM »

Dear reezyfbaby;

Bravo!,  -  You did it!

Please think once again how we did it!

For your new Question:  You mixed Joules up with calories!

Good Luck!
                    ARGOS++

Offline mr cool

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Re: phase change practice with other variables
« Reply #31 on: February 05, 2009, 06:03:20 PM »

Dear reezyfbaby;

Bravo!,  -  You did it!

Please think once again how we did it!

For your new Question:  You mixed Joules up with calories!

Good Luck!
                    ARGOS++


where did i mix them up? i don't see joules anywhere in that problem.

Offline ARGOS++

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Re: phase change practice with other variables
« Reply #32 on: February 05, 2009, 06:07:07 PM »

Dear reezyfbaby;

Can you identify:  59.75 J in your question/problem? J stands for Joules!

Good Luck!
                    ARGOS++

Offline mr cool

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Re: phase change practice with other variables
« Reply #33 on: February 05, 2009, 06:08:22 PM »

Dear reezyfbaby;

Can you identify:  59.75 J in your question/problem? J stands for Joules!

Good Luck!
                    ARGOS++


yea but i converted 59.75 joules into 250 calories. i know that J stands for Joules.

Offline ARGOS++

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Re: phase change practice with other variables
« Reply #34 on: February 05, 2009, 06:11:43 PM »
Dear reezyfbaby;

Remember!:  For that you have to divide it, - not multiply!

Good Luck!
                    ARGOS++

Offline mr cool

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Re: phase change practice with other variables
« Reply #35 on: February 05, 2009, 06:20:25 PM »
Dear reezyfbaby;

Remember!:  For that you have to divide it, - not multiply!

Good Luck!
                    ARGOS++


oh, that would explain it lol :)

so this is my first step?
(.5 cal/g)(50.00g)(F - -10.00*C) = 14.28 cal?

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Re: phase change practice with other variables
« Reply #36 on: February 05, 2009, 06:25:08 PM »

Offline mr cool

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Re: phase change practice with other variables
« Reply #37 on: February 05, 2009, 06:37:17 PM »

Offline ARGOS++

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Re: phase change practice with other variables
« Reply #38 on: February 05, 2009, 06:43:29 PM »

Offline mr cool

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Re: phase change practice with other variables
« Reply #39 on: February 05, 2009, 06:49:20 PM »

Offline ARGOS++

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Re: phase change practice with other variables
« Reply #40 on: February 05, 2009, 06:56:38 PM »

Offline mr cool

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Re: phase change practice with other variables
« Reply #41 on: February 05, 2009, 07:04:42 PM »
w/e i gave up on that problem because it frustrated me and i started the last one....

26.46 KJ of energy is released from 10.00 grams of steam as it condenses from 125.00*C.  What is the final temerature of the condensed water?

(.5 cal/g *C)(10.00g)(100-125) + (-540 cal/g)(10.00g)+(1.0 cal/g)(10.00g)(F-100*C) = 6323 calories

-125 cal + 5400 cal + 10 cal/g(F-100*C)=6323 calories

(10.00 cal/g)(Fo - 100*C) = 1038 calories

10.00 cal/g Fo

1038 calories
------------- =  103.8 *C
10.00 cal/g Fo

Offline ARGOS++

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Re: phase change practice with other variables
« Reply #42 on: February 05, 2009, 07:12:30 PM »

Offline mr cool

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Re: phase change practice with other variables
« Reply #43 on: February 05, 2009, 07:17:07 PM »

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