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How much did our sodium-in-water demonstration raise the temperature of water in the dessicator jar?  The reaction we performed was:                   Na(s) + H2O(l)  →  NaOH(aq) + 1/2H2(g)                               qreaction = ΔrHo = -184 kJ/mol-rxn Assuming the dessicator jar is well insulated (like our coffee-cup calorimeter), the energy balance is:                  0 = qsystem = qreaction + qwater  ⇒  qreaction = -qwater                  qreaction = -mwater*Cwater*ΔTwater The data from the demonstration was:  (a) 1.0 kg water, (b) 22.0oC, (d) Cwater = 4.18 J/g-K, (e) mNa = 0.21 g What is the molar mass of sodium, Na, in g/mol?

How much did our sodium-in-water demonstration raise the temperature of water in the dessicator jar?  The reaction we performed was:                   Na(s) + H2O(l)  →  NaOH(aq) + 1/2H2(g)                               qreaction = ΔrHo = -184 kJ/mol-rxn Assuming the dessicator jar is well insulated (like our coffee-cup calorimeter), the energy balance is:                  0 = qsystem = qreaction + qwater  ⇒  qreaction = -qwater                  qreaction = -mwater*Cwater*ΔTwater The data from the demonstration was:  (a) 1.0 kg water, (b) 22.0oC, (d) Cwater = 4.18 J/g-K, (e) mNa = 0.21 g What is the molar mass of sodium, Na, in g/mol?

Chemistry
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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How much did our sodium-in-water demonstration raise the temperature of water in the dessicator jar?  The reaction we performed was:

                  Na(s) + H2O(l)  →  NaOH(aq) + 1/2H2(g)                               qreaction = ΔrHo = -184 kJ/mol-rxn

Assuming the dessicator jar is well insulated (like our coffee-cup calorimeter), the energy balance is:

                 0 = qsystem = qreaction + qwater  ⇒  qreaction = -qwater

                 qreaction = -mwater*Cwater*ΔTwater

The data from the demonstration was:  (a) 1.0 kg water, (b) 22.0oC, (d) Cwater = 4.18 J/g-K, (e) mNa = 0.21 g

What is the molar mass of sodium, Na, in g/mol?

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