#14. Calculate the energy required to heat 12.5 g of water from a temperature of 42.2°C to 52.3°C.

Appl Of Ms Excel In Analytical Chemistry
2nd Edition
ISBN:9781285686691
Author:Crouch
Publisher:Crouch
Chapter4: Least-squares And Calibration Methods
Section: Chapter Questions
Problem 1P
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For questions #14-16, you should do your work on a
separate piece of paper and then upload it. You
should use the GUESS Method of solving for each
problem. Also, you have a choice. You can complete
both #14 & #15 which are single step question or do
the extension problem which is a 2 step problem
instead of 14 & 15. You must complete #16.
Equations
Q = mcAT
Q = ±mLf
Q = ±mLv
Values for Water
Clice) = 2.06 J/g°C
C(water) = 4.186 J/g°C
C(steam) = 1.87 J/g°C
Lf (water) = 333 J/g
Lv (water) = 2,260 J/g
%3D
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#14. Calculate the energy required to heat 12.5 g of
water from a temperature of 42.2°C to 52.3°C.
#15. How much thermal energy is needed in order to
turn 15.7 grams of water into ice?
Extension: We start with 23.2 grams of ice at 0°C
and add heat to the ice. The ice completely melts and
then is heated until it reaches 45.3°C. How much
energy is added in total?
#16. 12.0 g of a metal absorbs 317 J when it is
heated from 38.2°C to 82.7°C. What is the specific
heat of the metal?
Transcribed Image Text:For questions #14-16, you should do your work on a separate piece of paper and then upload it. You should use the GUESS Method of solving for each problem. Also, you have a choice. You can complete both #14 & #15 which are single step question or do the extension problem which is a 2 step problem instead of 14 & 15. You must complete #16. Equations Q = mcAT Q = ±mLf Q = ±mLv Values for Water Clice) = 2.06 J/g°C C(water) = 4.186 J/g°C C(steam) = 1.87 J/g°C Lf (water) = 333 J/g Lv (water) = 2,260 J/g %3D G- S- U- E- S- #14. Calculate the energy required to heat 12.5 g of water from a temperature of 42.2°C to 52.3°C. #15. How much thermal energy is needed in order to turn 15.7 grams of water into ice? Extension: We start with 23.2 grams of ice at 0°C and add heat to the ice. The ice completely melts and then is heated until it reaches 45.3°C. How much energy is added in total? #16. 12.0 g of a metal absorbs 317 J when it is heated from 38.2°C to 82.7°C. What is the specific heat of the metal?
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