Answered: Denise combines 0.2 g of Mg metal with…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions

Section5.8: Product- Or Reactant-favored Reactions And Thermodynamics

Problem 2.1ACP

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Denise combines 0.2 g of Mg metal with HCl and gets a final V of 234 mL which completely reacts (Mg + HCl = MgCl₂+ H₂). T_solution changes from 23.8 degrees C to 33 degrees C. The solution's density is 1 g/mL and C_s,H2O = 4.18 J/g degrees C. What is q_rxn?

Given the following:

C_gr + O₂ = CO₂ ΔH = -0.394 J

C_di + O₂ = CO₂ ΔH = -0.396 J

What is the ΔH of the conversion of graphite (C_gr) to diamond (C_di)?

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