0.390 J/gºC = 4.184 J/gºC nswer to the correct num

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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.39QP: You have two samples of different metals, metal A and metal B, each having the same mass. You heat...
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Question 14
A 25.0 g sample of zinc is heated and sequentially added to 65.0 mL of water. If the initial and
final temperatures of water are 20.00 °C and 22.50 °C, respectively, what was the initial
temperature of zinc?
Csh(Zn) = 0.390 J/gºC
Csh(H₂O) = 4.184 J/g°C
Give the answer to the correct number of significant figures, but do not include the unit.
Question 15
If 27.0 g of CH3OH (Csh = 2.53 J/g°C) at 50.0 °C are mixed with 50.0 g of C₂H5OH (Csh = 2.44
J/g°C) at 15.0 °C, what is the final temperature of the mixture to 3 sig. figs.? Do not include
units in your answer
Transcribed Image Text:0 Question 14 A 25.0 g sample of zinc is heated and sequentially added to 65.0 mL of water. If the initial and final temperatures of water are 20.00 °C and 22.50 °C, respectively, what was the initial temperature of zinc? Csh(Zn) = 0.390 J/gºC Csh(H₂O) = 4.184 J/g°C Give the answer to the correct number of significant figures, but do not include the unit. Question 15 If 27.0 g of CH3OH (Csh = 2.53 J/g°C) at 50.0 °C are mixed with 50.0 g of C₂H5OH (Csh = 2.44 J/g°C) at 15.0 °C, what is the final temperature of the mixture to 3 sig. figs.? Do not include units in your answer
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