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

Using mean bond dissociation enthalpies, estimate the enthalpy of combustion ΔcH of liquid ethanol

C2H5OH(l) + 3O2(g) => 2CO2(g) + 3H2O(l)

2 / 10

The enthalpy of combustion ΔcH of butan-1-ol = -2670 kJ mol-1

Using this figure and data from the 'Selection of Enthalpies of Formation and Combustion' shown above, calculate the enthalpy of formation ΔfH of liquid butan-1-ol

A Hess Cycle should be drawn to help you calculate this.

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

3 / 10

Using enthalpies of formation ΔfH, calculate the enthalpy change for the following reaction.

CaCO3(s) => CaO(s) + CO2(g)

Select the data from the 'Selection of Enthalpies of Formation and Combustion'.

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

4 / 10

The standard enthalpy change of formation of N2O(g) is +82 kJ mol-1. This shows that

5 / 10

The total O.N. of all the halogen atoms in these compounds ClO-, BrO-, ICl, XeF4 is:

6 / 10

What is the oxidation number of SULFUR in

S2O32-

7 / 10

What is the oxidation number of CARBON in

CCl4

8 / 10

What is the oxidation number of CARBON in

C2H6

9 / 10

What is the oxidation number of SULFUR in

SO3

10 / 10

Which of these true statements help to explain why the values of the first ionisation enthalpies (energies) of the group 1 metals fall down the group from lithium to caesium?

(i) Down the group, the outer electron gets further from the nucleus

(ii) The charge on the nucleus increases down the group

(iii) Greater shielding means that the attraction between the nucleus and the outer electron reduces down the group

(iv) In all the atoms the outer electron is an s-electron

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