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Define standard heat of formation with example |
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Answer» ᭄ꦿ★ANSWER★᭄ꦿ᭄The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent ELEMENTS, with all substances in their standard states.For example, although oxygen can exist as ozone (O3), ATOMIC oxygen (O), and molecular oxygen (O2), O2 is the most stable form at 1 atm PRESSURE and 25°C. Similarly, hydrogen is H2(g), not atomic hydrogen (H). |
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