Which of the following is not a characteristic of a catalyst?

Increases the yield of the product.

Which of the following will not increase the rate of a reaction?

increasing the size of solid reactants

The equation cannot be used to calculate average bond enthalpy.

ΔHΘ = Σ(ΔHfΘproducts) - Σ(ΔHfΘreactants)

Energy change when 1 mole of a substance is formed from its elements in their standard states.

Standard enthalpy change of formation

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IB Chemistry Review... Topics 5-6 (non-IB type questios)

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#IB Chemistry Standard Level Topic 5: Energetics and Thermochemistry Topic 6: Chemical Kinetics

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Answers

1
A measure of the average kinetic energy of particles.
enthalpy: ΔH, units of kJ/mol
heat: q, units of kJ
energy: E, units of kJ
temperature: T, units of K
2
Which of the following is not an acceptable value of c_(water).
4.18 J g-1 C-1
4.18 kJ kg-1 K-1
4.18 kJ g-1 K-1
4.18 J g-1 K-1
3
Which of the following is not a characteristic of a catalyst?
Lowers the activation energy by providing another rxn path.
Increases the yield of the product.
Is not consumed by the reaction and may be used again.
Increases the rate of the forward and reverse reactions.
4
Which of the following cannot be used to measure the rate of a reaction?
change in pH
change in time
change in conductivity
change in color
5
Which of the following is not part of collision theory?
Particles must collide.
Colliding particles must have the correct orientation.
All collisions are elastic.
Colliding particles must have sufficient kinetic energy.
6
The official definition of rate in chemistry.
rate = Δconcentration ⋅ Δtime
rate = Δmoles/Δtime
rate = Δmass/Δtime
rate = Δconcentration/Δtime
7
Which of the following will not increase the rate of a reaction?
increasing the temperature
adding a catalyst
increasing the size of solid reactants
increasing the concentration of the reactants
8
The equation for heat (q).
q = ΔH/n
q = mcΔH
q = mcΔT/n
q = mcΔT
9
A catalyst that has the same physical phase (s, l, g, aq) as the reactants.
transition state
intermediate
heterogeneous
homogeneous
10
Bond forming is _________, while bond breaking is _________.
endothermic, exothermic
exothermic, endothermic
11
The equation cannot be used to calculate average bond enthalpy.
ΔHΘ = Σ(ΔHfΘproducts) - Σ(ΔHfΘreactants)
ΔHΘ = Σ(bonds broken) - Σ(bonds formed)
ΔHΘ = Σ(ΔHfΘreactants) - Σ(ΔHfΘproducts)
12
Energy change when 1 mole of a substance is formed from its elements in their standard states.
Standard enthalpy change of combustion
Lattice enthalpy
Standard enthalpy change of formation
Average bond enthalpies

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