15 Determinę the enthalpy for the reaction (states of matter left out)2 SrCO3 2 Sr + 2 C +3 O22 Sr + O2 2 SrOSrO + CO2CO2 C + O2H = -1184 kJSrCO, H--234 kJH = 394kJ

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Determine the enthalpy for the reaction (states of matter left out) 2 SRCO3 - 2 Sr + 2 C+ 3 02 2 Sr + O2 2 SrO H = -1184 kJ SRCO3 H--234 kJ H = 394kJ SrO + CO2 CO2 C + O2

World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter10: Energy

Section: Chapter Questions

Problem 3STP

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Concept explainers

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.

Question

15 Determinę the enthalpy for the reaction (states of matter left out)
2 SrCO3 2 Sr + 2 C +3 O2
2 Sr + O2 2 SrO
SrO + CO2
CO2 C + O2
H = -1184 kJ
SrCO, H--234 kJ
H = 394kJ

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