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(a) Burning of 15.5 g of propane: C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(l)      ΔH° = -2220 kJ (b) Reaction of 4.88 g of barium hydroxide octahydrate with ammonium chloride: Ba(OH)2 . 8 H2O(s) + 2 NH4Cl(s) --> BaCl2(aq) + 2 NH3(aq) +10 H2O(l) ΔH° = +80.3 kJ

(a) Burning of 15.5 g of propane: C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(l)      ΔH° = -2220 kJ (b) Reaction of 4.88 g of barium hydroxide octahydrate with ammonium chloride: Ba(OH)2 . 8 H2O(s) + 2 NH4Cl(s) --> BaCl2(aq) + 2 NH3(aq) +10 H2O(l) ΔH° = +80.3 kJ

Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter7: Chemical Energy
Section: Chapter Questions
Problem 59E: In a coffee-cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M HCl are mixed to yield...
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How much heat in kilojoules is evolved or absorbed in each of the
following reactions?

(a) Burning of 15.5 g of propane:

C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(l)      ΔH° = -2220 kJ

(b) Reaction of 4.88 g of barium hydroxide octahydrate with ammonium chloride:

Ba(OH)2 . 8 H2O(s) + 2 NH4Cl(s) --> BaCl2(aq) + 2 NH3(aq) +10 H2O(l)

ΔH° = +80.3 kJ

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