4 NH3 (g) + O2 (g) ➝ 2 N2H4 (g) + 2 H2O (l) ΔHº = –196.42 kJ • Calculate the overall change in enthalpy when 10.00 grams of NH3 (g) reacts with excess O2 (g). [Be sure to include the correct sign.] Enthalpy change: ___ kJ
4 NH3 (g) + O2 (g) ➝ 2 N2H4 (g) + 2 H2O (l) ΔHº = –196.42 kJ • Calculate the overall change in enthalpy when 10.00 grams of NH3 (g) reacts with excess O2 (g). [Be sure to include the correct sign.] Enthalpy change: ___ kJ
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.63QE: A 0.470-g sample of magnesium reacts with 200 g dilute HCl in a coffee-cup calorimeter to form...
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4 NH3 (g) + O2 (g) ➝ 2 N2H4 (g) + 2 H2O (l) ΔHº = –196.42 kJ
• Calculate the overall change in enthalpy when 10.00 grams of NH3 (g) reacts with excess O2 (g).
[Be sure to include the correct sign.]
Enthalpy change: ___ kJ
• How many grams of H2O (l) are produced when the reaction above releases 144.4 kJ of heat energy.
_____ grams of H2O (l)
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