Chemistry Data Sheet
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2HigHer ScHool certificate eXaMiNatioN
Chemistry
DATA SHEET
23
–1
................................................................... 6.022 × 10
Avogadro constant, N
mol
A
Volume of 1 mole ideal gas: at 100 kPa and
at 0°C (273.15 K) ....................... 22.71 L
at 25°C (298.15 K) ..................... 24.79 L
–14
.................. 1.0 × 10
Ionisation constant for water at 25°C (298.15 K), K
w
3
–1
–1
Specific heat capacity of water ...................................................... 4.18 × 10
J kg
K
Some useful formulae
+
pH = –log
D H = – mC D T
[H
]
10
Some standard potentials
Aylward and Findlay, SI Chemical Data (5th Edition) is the principal source of data for
this examination paper. Some data may have been modified for examination purposes.
– 1 –
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