Much of the lead used for batteries and ammunition during the First World War and the Second World War came from galena, PbS(s). Equation I represents the first step in the refining process to produce solid lead from galena. Equation I 2PbS(s) + O₂(g) 2PbO(s) + 250₂(9) AH-827.4 kJ If energy were included as a term in the equation, it would written as Select one: O2PbS(s) + O₂(g) +827.4 kJ 2PbO(s) + 2SO₂(g) O2PbS(s) + O₂(g) - 2PbO(s) + 25O₂(g) + 827.4 kJ O 2PbS(s) + O₂(g) 2PbO(s) + 2SO₂(g) - 827.4 kJ O2PbS(s) + O₂(g)-827.4 kJ 2PbO(s) + 2SO₂(g)
Much of the lead used for batteries and ammunition during the First World War and the Second World War came from galena, PbS(s). Equation I represents the first step in the refining process to produce solid lead from galena. Equation I 2PbS(s) + O₂(g) 2PbO(s) + 250₂(9) AH-827.4 kJ If energy were included as a term in the equation, it would written as Select one: O2PbS(s) + O₂(g) +827.4 kJ 2PbO(s) + 2SO₂(g) O2PbS(s) + O₂(g) - 2PbO(s) + 25O₂(g) + 827.4 kJ O 2PbS(s) + O₂(g) 2PbO(s) + 2SO₂(g) - 827.4 kJ O2PbS(s) + O₂(g)-827.4 kJ 2PbO(s) + 2SO₂(g)
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Problem 41QAP: The enthalpy change for the reaction of hydrogen gas with fluorine gas (o produce hydrogen fluoride...
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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:Much of the lead used for batteries and ammunition during the First World War and the Second World War came from galena, PbS(s). Equation I represents the first step in the refining process to produce solid lead from galena.
Equation I 2PbS(s) + O₂(g) → 2PbO(s) + 25O₂(g) AH = -827.4 kJ
If energy were included as a term in the equation, it would written as
Select one:
2PbS(s) + O₂(g) +827.4 kJ → 2PbO(s) + 2SO₂(g)
O 2PbS(s) + O₂(g)
2PbO(s) + 25O₂(g) + 827.4 kJ
O 2PbS(s) + O₂(g)
2PbO(s) + 25O₂(g) 827.4 kJ
O 2PbS(s) + O₂(g) - 827.4 kJ 2PbO(s) + 2SO₂(g)
-
kj
The enthalpy change for 1.00 mol of galena being oxidized in Equation I, expressed in scientific notation, is ±a.bc x 10d The values of a, b, c and d are +
mol
Two solid fuel rocket boosters each containing 1.1 million pounds of fuel are utilized to propel the Space Shuttle into space. The reaction equation for the solid fuel is as follows:
3NH4CIO4(s) + 3Al(s) → Al₂O3(s) + AICI3(s) + 3NO(g) + H₂O(l) + 2934.9 kJ
The enthalpy change when 9.50 mol of ammonium perchlorate reacts would be
Record your 3-digit answer. Include sign; do not include units.
Which of the following reactions is accompanied by an increase in enthalpy?
Select one:
O 2503(g)2SO₂(g) + O₂(g)
O 2NO(g) + O₂(g) → 2NO₂(g) + 113 kJ
O 4HCI(g) + O₂(g) → 2H₂O(g) + 2Cl₂(g)
O 2H₂(g) + O₂(g) - 484 kJ → 2H₂O(g)
A,H° +197 kJ
A,H° -111.4 kJ
+
MegaJoules.
and +
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