Q. In exothermic reaction, enthalpy of reactants is

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Q. The heat change during any physical or chemical change taking place at constant pressure is called

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Q. The units of heat capacity are

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Q. In endothermic reaction, the enthalpy change of products is

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Q. The apparatus used to measure the enthalpy of combustion of a substance is

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Q. Amount of heat absorbed in melting one mole of solid is

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Q. During melting, there is change in intermolecular distances and potential energy of atom, ion and molecules

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Q. The quantity of heat q is evolved or absorbed during the reaction is given by

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Q. The amount of heat evolved when one mole of a substance is completely burnt in oxygen is

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Q. Hf of ice is

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Q. In halogens, iodine has biggest size and

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Q. The amount of heat absorbed when one mole of gaseous atoms are formed from the element is

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Q. Molar heat of sublimation of iodine is

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Q. The quantity of heat required to change the temperature by 1 Kelvin is called

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Q. When heat is absorbed by the system, change in entropy is

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Q. When heat flows from one system to another, the net change in entropy is

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Q. The efficiency of an electric generator is about

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Q. The concept of entropy was introduced by

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Q. For all real processes where heat transfer occurs, the entropy

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Q. A measure of disorder within a macroscopic system is called

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