Oxidation and reductio and half equations

+7

what does manganese(II) mean?

Explain why chlorine has a lower boiling point than bromine. (2 marks)

Chlorine is smaller than bromine

Cl2 has weaker / fewer / less (VdW) intermolecular forces / forces between molecules

ΔH = ΣΔHf (products) − ΣΔHf (reactants)

= 5(−635) − (−1560)

= − 3175 + 1560

= − 1615 (kJ mol−1)

this is a reduction reaction

calcium is expensive to extract

Suggest why the value for the standard enthalpy of formation of liquid antimony, given in the table above, is not zero.

Sb is not in its standard state

Or Standard state (for Sb) is solid / (s)

State the type of reaction that antimony(III) oxide has undergone in this reaction.

Reduction (+3 to 0)

When asked these sorts of questions on a reaction being high or low cost what should you look out for?

how many steps it takes

how expensive the materials/ catalysts are

How much energy it requires

It’s D. because I- has a free electron that is further away from the nucleus than Cl- so it reduces easier.