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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: Molar energy
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[Post New]23 Jun 2007 20:04:54 IST
    Subject: Molar energy
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srujana (3132)

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What change in molar energy in joule  would be associated with an atomic transition giving rise to radiation at 1 Hz?

What is meant by molar energy?

The answer is 3.99 *10-10 (units not known)
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[Post New]23 Jun 2007 20:20:49 IST
    Subject: Molar energy
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striker (256)

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FIRST CONSIDER ONE ATOM
ENERGY CONCERNED WITH ONE Hz FRE = hv=6.625*10(-34)Js*1Hz
for one mole avagadro no of atoms
so Na*6.625*10(-34)J= UR ANS IN JOULES
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[Post New]27 Jun 2007 19:58:45 IST
    Subject: Re:Molar energy
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vijay_cluster (64)

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Molar energy means energy for l mole of electrons ( Avagadro Number of
electrons)
Given that frequency = 1Htz
Energy associated for 1 Htz frequency = hv = 6.625 x 10(-34) x 1 J
Molar energy = avagadro number x 6.625 x 10(-34)
                    = 6.023 x 10(23)  x 6.625 x 10(-34)
                    = 3.99 x 10(-10) J/mole
unit for molar energy is J/mole
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