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3. From the following data, determine the enthalpy of formation (AH°,) for diborane, B,H(g), at 298 K: (1) B:Hslg) + 30:(g)→B:0:(s) + 3H;O(g) AH =-1941 kJ mo (2) 28(5) +0:(8)>B:05) AH° = -2368 kJ mol (3) Hale) +0:(8)→H;O(g) AH = -241.8 kJ mol

3. From the following data, determine the enthalpy of formation (AH°,) for diborane, B,H(g), at 298 K: (1) B:Hslg) + 30:(g)→B:0:(s) + 3H;O(g) AH =-1941 kJ mo (2) 28(5) +0:(8)>B:05) AH° = -2368 kJ mol (3) Hale) +0:(8)→H;O(g) AH = -241.8 kJ mol

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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3. From the following data, determine the enthalpy of formation (AH°,) for diborane, B,H;(g), at 298 K: (1) B;He(g) + 30:(g)→B2O:(s) + 3H;O(g) AH° = -1941 kJ mol (2) 28(s) +0:(8)>B:0:(5) AH° = -2368 kJ mol (3) H:(e) +0:(8)→H;O(g) AH° = -241.8 kJ mol 4. An experimenter places 15.0 mmol of A and 18.0 mmol of B in a container. The container is heated to 600 K, and the gas-phase equilibrium A +B+ 2C+ 3D is established. The equilibrium mixture is found to have pressure 1085 torr and to contain 10.0 mmol of C. Calculate K and AG° at 600 K, assuming ideal gas. 5. The rate constant for the first-order decomposition of a compound A in the reaction 2 A →P is k = 2.78 x 107s at 25°C. (a) Determine the half-life of A (b) Determine the pressure, initially 32.1 kPa at 10 mins after the initiation of reaction
Transcribed Image Text:3. From the following data, determine the enthalpy of formation (AH°,) for diborane, B,H;(g), at 298 K: (1) B;He(g) + 30:(g)→B2O:(s) + 3H;O(g) AH° = -1941 kJ mol (2) 28(s) +0:(8)>B:0:(5) AH° = -2368 kJ mol (3) H:(e) +0:(8)→H;O(g) AH° = -241.8 kJ mol 4. An experimenter places 15.0 mmol of A and 18.0 mmol of B in a container. The container is heated to 600 K, and the gas-phase equilibrium A +B+ 2C+ 3D is established. The equilibrium mixture is found to have pressure 1085 torr and to contain 10.0 mmol of C. Calculate K and AG° at 600 K, assuming ideal gas. 5. The rate constant for the first-order decomposition of a compound A in the reaction 2 A →P is k = 2.78 x 107s at 25°C. (a) Determine the half-life of A (b) Determine the pressure, initially 32.1 kPa at 10 mins after the initiation of reaction
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