BMS1049 chem3.2

What type of reaction is this?

Fe²⁺ → Fe³⁺ + e^-

• Decomposition

• Combustion

• Oxidation

• Reduction

This reaction has a ΔH of +12.4 kJmol^-1

NaHCO₃ (s) + CH₃COOH (aq) → CH₃COONa (aq) + H₂O (l) + CO₂ (g)

Is it:

• Exothermic

• Endothermic

• Exergonic

• Endergonic

The same reaction has a ΔH of +12.4 kJmol^-1, but a ΔG of of -17.2 kJmol^-1
How can that be explained?

• Temperature increases

• Temperature decreases

• Entropy increases

• Temperature decreases

That reaction has a ΔH of +12.4 kJmol^-1, but a ΔG of -17.2 kJmol^-1
Which of the following is not a way the reaction can be described?

• Endergonic

• Feasible

• Endothermic

• Spontaneous

What type of reaction is

NaHCO₃ + CH₃COOH → CH₃COONa + H₂O + CO₂ ?

• Combination

• Decomposition

• Combustion

• Neutralisation

Which word best describes this reaction?

CaCO₃ (s) + 2HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂(g)

ΔH = +75 kJ mol^-1

• Exothermic

• Endothermic

• Endergonic

• Exergonic

What happens to entropy in this reaction?

CaCO₃ (s) + 2HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂(g)

ΔH = +75 kJ mol^-1

• Increases

• Decreases

• Doesn't change

• Impossible to say

Ethylene (ethene) is most likely to react with what?

• Methane

• Catalysts

• Nucleophiles

• Electrophiles