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Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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2. A student carrying out Reaction (1) reacts 95.7 mL of 1.00 M HCI and 1.022 g of MgO
in the coffee cup calorimeter. The initial temperature recorded was 19.1 °C and the final
temperature was 26.4 °C. (Hints: Both the density and specific heat capacity of the 1.00
M HCI is that of water, D= 1.00 g/mL and C= 4.184 J/g °C)
a) Surroundings (solution): qsoin= mass of soln x specific heat capacity of soln x At
Determine the qsoin in kJ.
b) System (reaction): Determine qrxn. (Hint: qsoln =-qrxn)
c) Determine the moles of MgO used.
d) Determine AH/ mol using the results from b) and c) for Reaction (1).
Transcribed Image Text:2. A student carrying out Reaction (1) reacts 95.7 mL of 1.00 M HCI and 1.022 g of MgO in the coffee cup calorimeter. The initial temperature recorded was 19.1 °C and the final temperature was 26.4 °C. (Hints: Both the density and specific heat capacity of the 1.00 M HCI is that of water, D= 1.00 g/mL and C= 4.184 J/g °C) a) Surroundings (solution): qsoin= mass of soln x specific heat capacity of soln x At Determine the qsoin in kJ. b) System (reaction): Determine qrxn. (Hint: qsoln =-qrxn) c) Determine the moles of MgO used. d) Determine AH/ mol using the results from b) and c) for Reaction (1).
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