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(C= 0.581 cal/g deg C; desity = 0.80g/mL)

its basically: (0.80g/mL)(0.581cal/g x degrees C)

... and I need help from here on.

[college chemisty 310 class; im a 10th grader in HS needing some guidance..1st college class.. thats all.]

2007-02-20 19:19:50 · 1 answers · asked by melia_bg 1 in Science & Mathematics Chemistry

1 answers

1) Calculate the mass of ethanol
Mass = 25 mL x 0.8 g/mL = 20 g

2) Calculate the specific heat of ethanol.
1 cal = 4.18 J therefore
specific heat = 0.581 cal/(g deg C) * 4.18 J/cal = 2.43 J /(g deg C)

3) Calulate the temperature increase
temp increase = energy supplied / (mass * specific heat) = 486 J /(20 g * 2.43 J /(g deg C) ) = 10 deg C

Conclusion: the final temperature will be 20 deg C

2007-02-21 20:21:58 · answer #1 · answered by cordefr 7 · 0 0

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