1. Consider the following reaction, which occurs at standard state: 2C1(g) C12(g) AH° = –243.4 kJ a. Which has the higher, more positive, enthalpy under these conditions, 2Cl (g) or C12(g)? b. Consider the following reaction: 2 Mg(s) + 02(g) → 2 MgO(s) AH = -1204 kJ. c. Is the reaetion exothermic or endothermic? d. Calculate the amount of heat transferred when 2.4 g of Mg(s) reacts at constant pressure. How many grams of MgO are produced during an enthalpy change of 96.0 kJ? e. How many kJ of heat are absorbed when 7.50g of MgO(s) are decomposed into Mg(s) and O{g)at constant pressure?
1. Consider the following reaction, which occurs at standard state: 2C1(g) C12(g) AH° = –243.4 kJ a. Which has the higher, more positive, enthalpy under these conditions, 2Cl (g) or C12(g)? b. Consider the following reaction: 2 Mg(s) + 02(g) → 2 MgO(s) AH = -1204 kJ. c. Is the reaetion exothermic or endothermic? d. Calculate the amount of heat transferred when 2.4 g of Mg(s) reacts at constant pressure. How many grams of MgO are produced during an enthalpy change of 96.0 kJ? e. How many kJ of heat are absorbed when 7.50g of MgO(s) are decomposed into Mg(s) and O{g)at constant pressure?
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.53PAE: 9.53 Using these reactions, find the standard enthalpy change for the formation of 1 mol of PhO(s)...
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Transcribed Image Text:1. Consider the following reaction, which occurs at standard state:
2C1(g) C12(g) AHº =–243.4 kJ
a. Which has the higher, more positive, enthalpy under these conditions, 2Cl
(g) or C12(g)?
b. Consider the following reaction: 2 Mg(s) + 02(g) → 2 MgO(s) AH =
-1204 kJ.
c. Is the reaetion exothermic or endothermic?
d. Calculate the amount of heat transferred when 2.4 g of Mg(s) reacts at
constant pressure. How many grams of MgO are produced during an
enthalpy change of 96.0 kJ?
e. How many kJ of heat are absorbed when 7.50g of MgO(s) are
decomposed into Mg(s) and O{g)at constant pressure?
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