9.54 The phase change between graphite and diamond is difficult to observe directly. Both substances can be hurned, however. From these equations, calculate Δ H ° for the conversion of diamond into graphite. C ( s , graphite ) + O 2 ( g ) → CO 2 ( g ) Δ H ° = -393.51 kJ C ( s , diamond ) + O 2 ( g ) → CO 2 ( g ) Δ H ° = -395.94 kJ
9.54 The phase change between graphite and diamond is difficult to observe directly. Both substances can be hurned, however. From these equations, calculate Δ H ° for the conversion of diamond into graphite. C ( s , graphite ) + O 2 ( g ) → CO 2 ( g ) Δ H ° = -393.51 kJ C ( s , diamond ) + O 2 ( g ) → CO 2 ( g ) Δ H ° = -395.94 kJ
Solution Summary: The author explains that Hess's law allows us to calculate the heat of reaction for any reaction that occurs at standard conditions.
9.54 The phase change between graphite and diamond is difficult to observe directly. Both substances can be hurned, however. From these equations, calculate
Δ
H
°
for the conversion of diamond into graphite.
1a)Rank the following ionic compounds in order of lattice energy, from the least exothermic (least negative lattice enthalpy) to the most exothermic (most negative lattice enthalpy): Rbl, CaO, SrO, NaCl
1b)Rank the following elements in order of increasing metallic character (from least metallic to most metallic): Ca, S, Rb, Ar, Se
1c) by using the attached table of bond enthalpies, predict ?rH of the following reaction in kJ/mol
H2N-NH2 + O2 ---> N2+ 2H2O
he combustion of hydrogen gas releases 286 kJ per mol of hydrogen. If 11.0 L of hydrogen at STP was burned to produce electricity, how long would it power a 100-watt (W) light bulb? Assume no energy is lost to the surroundings.
(1 W = 1 J/s)
6.) Calculate the enthalpy change when 14.5 g of water vapor condenses to liquid water.
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Calorimetry Concept, Examples and Thermochemistry | How to Pass Chemistry; Author: Melissa Maribel;https://www.youtube.com/watch?v=nSh29lUGj00;License: Standard YouTube License, CC-BY