Welcome to the Quiz!
This quiz contains 11 questions from a mix of 1 subtopics.
Which symbol represents standard conditions?
ΔH
H
⦵
Δ
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What is the unit typically used for standard enthalpy changes?
kJ
J
kJ mol-1
mol
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The standard enthalpy change of formation, ΔH⦵f, is the enthalpy change when one mole of a is formed from its under standard conditions.
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The standard enthalpy change of combustion, ΔH⦵c, is the enthalpy change that occurs when mole of a substance reacts with under standard conditions, with all reactants and products in their standard states.
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The standard enthalpy change of neutralisation, ΔH⦵neut, is the enthalpy change that accompanies the reaction of an acid by an alkali to form mole of .
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Standard conditions refer to a pressure of kPa and a temperature of °C.
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What does the value of ΔH⦵ indicate about a reaction?
the concentration of the reactants
the rate of the reaction
the amount of heat released or absorbed during the reaction
the number of moles of a substance reacting
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Which of the following ΔH⦵ values would represent an enthalpy change of combustion?
-100 kJ mol-1
0 kJ mol-1
100 kJ mol-1
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What enthalpy change does the following equation refer to?
Na(s) + 1⁄2H2(g) + C(s) + 3⁄2O2(g) ➔ NaHCO3(s)
neutralisation
displacement
combustion
formation
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In an reaction, energy is transferred from the surroundings to the reaction.
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In an reaction, the energy released in forming bonds in the products is greater than the energy required to bonds in the reactants.
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