2. Hydrogen, H2, is thought to be the fuel of the 21t century (by some): H2 (g) + O2 (g) -> H20 (g) AH, of hydrogen = 0 kJ/mole. %3! a. For every 1 mole of hydrogen that reacts,_moles of CO2 are produced. AH of this reaction = KJ/mole. Blank 1: give a number with 2 significant figures only. Do not include text. Blank 2: give a number with 3 significant figures only. Do not include text. Separate each answer with a comma. Your answer b. This reaction is because the energy required to break bonds in the reactants is the energy released when bonds form to make products. Exothermic (blank 1) Endothermic (blank 1) is greater than (blank 2) equals (blank 2) is less than (blank 2)
2. Hydrogen, H2, is thought to be the fuel of the 21t century (by some): H2 (g) + O2 (g) -> H20 (g) AH, of hydrogen = 0 kJ/mole. %3! a. For every 1 mole of hydrogen that reacts,_moles of CO2 are produced. AH of this reaction = KJ/mole. Blank 1: give a number with 2 significant figures only. Do not include text. Blank 2: give a number with 3 significant figures only. Do not include text. Separate each answer with a comma. Your answer b. This reaction is because the energy required to break bonds in the reactants is the energy released when bonds form to make products. Exothermic (blank 1) Endothermic (blank 1) is greater than (blank 2) equals (blank 2) is less than (blank 2)
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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.96QP: Hydrogen is an ideal fuel in many respects; for example, the product of its combustion, water, is...
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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.
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Transcribed Image Text:2. Hydrogen, H2, is thought to be the fuel of the 21st century (by some):
H2 (g) + O2 (g) -> H20 (g)
AH, of hydrogen = 0 kJ/mole.
a. For every 1 mole of hydrogen that reacts,_moles of CO2 are produced. AH of
this reaction =_ KJ/mole.
Blank 1: give a number with 2 significant figures only. Do not include text. Blank 2: give a number with 3
significant figures only. Do not include text. Separate each answer with a comma.
Your answer
b. This reaction is because the energy required to break bonds in the
the energy released when bonds form to make products.
reactants is
Exothermic (blank 1)
Endothermic (blank 1)
is greater than (blank 2)
equals (blank 2)
is less than (blank 2)
Transcribed Image Text:c. The hydrogen combustion reaction work because there are moles of gas
reactants compared to_moles of gas products. This causes a
of gas.
Blanks 2 and 3: Give a number with 1 significant figure in "Other". Do not include text. Separate each
answer with a comma.
Produces (blank 1)
Absorbs (blank 1)
Does not involve (blank 1)
Expansion (blank 4)
Compression (blank 4)
Neither expansion nor compression (blank 4)
Other:
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