Question

For which of the following is the standard enthalpy of formation NOT equal to zero? Group of answer choices C(s, diamond) Na(s) H2(g) Br2(l) Al(s)

          For which of the following is the standard enthalpy of formation NOT equal to zero? Group of answer choices C(s, diamond) Na(s) H2(g) Br2(l) Al(s)
        

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Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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For which of the following is the standard enthalpy of formation NOT equal to zero? Group of answer choices C(s, diamond) Na(s) H2(g) Br2(l) Al(s)
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Transcript

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00:01 Hi, in this question we are given with 5 options.
00:04 We are asked to select the one which is having the standard enthalpy of formation not equal to 0.
00:12 We can say that all elements in their standard state are having 0 standard enthalpy of formation.
00:39 We know that sodium is a metal and in pre -state or in the standard state it is present in solid state.
00:55 But here we are given that it is present in gaseous state.
00:58 Therefore we can say for this the standard enthalpy of formation is not equal to 0...
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