What is Hess's law?
The enthalpy change in a reaction is independent of the route taken.
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Flask Q (volume = 1.00 x 103 cm3 ) is filled with ammonia (NH3) at 102 kPa and 300 K. Calculate the mass of ammonia in flask Q. (Gas constant R = 8.31 J K−1 mol−1 )
What is meant by the 'First Ionisation Energy' of an element?
Can you explain Le Chatelier's Principle?