InterviewSolution
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InterviewSolution
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Which of the following equation gives the values of heat of formation `(DeltaH_(f)^(@))`?A. C(diamond) ` + O_(2)(g) rarr CO_(2)(g)`B. `(1)/(2) H_(2)(g) + (1)/(2)F_(2)(g) rarr HF (g)`C. `N_(2)(g) + 3H_(2)(g) rarr 2NH_(3)(g)`D. `H_(2)(g) + F_(2)(g) rarr 3HF(g)` |
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Answer» Correct Answer - B The amount of heat either evoved or absorbed when one gram mole of a substance is formed from its constituent elements, is known as the standard heat of formation `(DeltaH_(f)^(@))`. Standard state temperature os `25C^(@)` or `298K` and pressure of gaseous substance heat of formation of HF. `(1)/(2) H_(2)(g) + (1)/(2)F_(2)(g) rarr HF (g), DeltaH_(f)^(@) = ?` (Standard heat of formation of HF (g)) |
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