The enthalpies of all elements in their standard states are:(i) Unity (ii) Zero(iii) < 0 (iv) Different for every element
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Solution 1
The enthalpies of all elements in their standard states are zero. This is because by definition, the standard state of an element is its pure form at 1 atm and 25°C (or 298K). The enthalpy of formation for an element in its standard state is zero because there is no formation reaction needed when th Knowee AI is a powerful AI-powered study tool designed to help you to solve study problem.
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