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Thermodynamics
Why the heat of neutralisation is less than 57.1 kJ if either the acid or the base or both are weak?
If acid or base is weak its ionisation is not complete in aqueous solutions. Therefore,a part of the energy liberated during the combination of H+ ions and OH- ions is utilised for the ionisation of weak acid or base. Hence, the heat of neutralisation is less than 57.1KJ.
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What do you understand by the terms: the system and surroundings?
Classify the following into different types of systems:
(i) Tea placed in a cup
(ii) Tea placed in a tea-pot
(iii) Tea placed in a thermosflask.
Define a closed system.
Define an isolated system.
Define intensive properties.
Define extensive properties.
Why all living systems need to be 'open systems'?
Define state variables of a system.
From thermodynamic point of view, to which system the animals and plants belong?
What is a state function?
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