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IB chemistry HL Exam Questions and Answers (latest Update 2024)
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IB chemistry HL Exam Questions and Answers (latest Update 2024)
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IB chemistry HL Exam Questions andAnswers (latest Update 2024)
exothermic reaction - Correct Answer ✅heat is released by
the system
ΔΗ<0
endothermic reaction - Correct Answer ✅heat is absorbed
by the system
ΔΗ>0
standard enthalpy change of reaction(ΔΗ) - Correct Answer
✅the heat energy transferred under standard conditions
(pressure-101.3 kPa, temperature- 298 K)
combustion and neutralization are exothermic processes -
Correct Answer ✅
average bond enthalpy - Correct Answer ✅the energy
required to break one mole of a certain type of bond in the
gaseous state averaged across a variety of compounds
, IB chemistry HL Exam Questions and
Answers (latest Update 2024)
bond ethaply - Correct Answer ✅bond breaking is
endothermic
bond making is exothermic
ΔH= broken - formed
or reactants-products
bond making - Correct Answer ✅is exothermic
energy is released as you bring together the particles that
have an attractive force
bond breaking - Correct Answer ✅is endothermic
as it involves separation of particles, you put energy in to the
reactants
standard state - Correct Answer ✅the physical state of a
substance at standard conditions
standard conditions - Correct Answer ✅25 0C/ 298K;
1 atm/ 101.3 kPa;
1.0M
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