40. Define the following:
(i) First law of thermodynamics.
(ii) Standard molar enthalpy of formation.
40. Define the following:
(i) First law of thermodynamics.
(ii) Standard molar enthalpy of formation.
40. (i) First law of thermodynamics: It states that energy can neither be created nor be destroyed. The energy of an isolated system is constant.
?u = q + w
(ii) The standard enthalpy change for the formation of one mole of a compound from its elements in their most stable states of aggregation (also
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Chemistry Ncert Solutions Class 11th 2023
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