Stoichiometry
Heat of reaction is not influenced by

Whether the reaction is carried out at constant temperature or constant pressure
The physical state (e.g., solid, liquid or gaseous) of reactants and products
The route/method through which final products are obtained
None of these

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Stoichiometry
Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

Attractive forces between like and unlike molecules are approximately equal
All of these
Sizes of the component molecules are approximately equal
Component molecules are non-polar and no chemical combination or molecular association between unlike molecules takes place in the formation of the solution

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