Period Table & Energy Random Retrieval

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Period Table & Energy Random Retrieval

This quiz contains all the questions in the Period Table & Energy section. The website will pick 10 questions at random.

1 / 10

This is the equilibrium in a solution of bromine in water:

Br2(aq) + H2O(l) <=> HOBr(aq) + H+(aq) + Br-(aq)

The orange colour of bromine disappears on adding

(i) sodium bromide

(ii) water

(iii) dilute hydrochloric acid

(iv) sodium hydroxide solution

2 / 10

The synthesis of sulfur trioxide takes place at 380 oC in the presence of a catalyst made from vanadium(V) oxide.

2SO2(g) + O2(g) <=> 2SO3(g) Standard enthalpy change = -297 kJ mol-1

Reasons for not choosing a lower temperature are that:

(i) the product condenses to a solid at a lower temperature

(ii) the proportion of SO3(g) at equilibrium falls if the temperature falls

(iii) the reaction is exothermic

(iv) the catalyst is ineffective at lower temperatures

3 / 10

Which of these systems is NOT in a state of dynamic equilibrium?

4 / 10

Using enthalpies of combustion ΔcH, calculate the enthalpy change for the hydrogenation of propene:

C3H6(g) + H2(g) => C3H8(g)

Select the data from theenthalpies of combustion ΔcH.

If this question was generated from Random Retrieval, this data can also be found in TOOLS>Data Sheets.

5 / 10

The standard enthalpy of combustion of methane is -890 kJ mol-1. Calculate the energy given out on burning 3.2 g methane.

6 / 10

An example of an endothermic change is the:

7 / 10

Which of these ions has the greatest polarising power?

8 / 10

What is the oxidation number of CARBON in

CH4

9 / 10

What is the oxidation number of SULFUR in

SO3

10 / 10

In the periodic table a periodic pattern is:

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