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Q.

Calculate the kinetic energy of a mole of  CO  gas at  500Kin (i)  kcal and (ii) k J

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answer is 1.49.

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Detailed Solution

T=500K  k=1.381×10−23JK−                                  We know that: K.E. =32kT=32×1.381×10−23JK−molecule ×500K=1.04×10−20J (molecule) −=1.04×10−20J×1kJ1000J molecule  =1.04×10−23kJ (molecule) −=1.04×10−23kJ (molecule) −×6.02×1023=6.26kJ Ans.                 (ii)  4.184kJ=1k   Hence,   . E.=1.04×10−23kJ×1k cal 4.184kJ molecule or  K.E.=2.48×10−24k cal (molecule) −×6.02×1023 molecule 1mol=1.49kcalmol−
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