Chemical Thermodynamics Question 382

Question: The enthalpies of formation of Al2O3 and Cr2O3 are 1596kJ and 1134kJ respectively. ΔH for the reaction 2Al+Cr2O32Cr+Al2O3 is

Options:

A) 2730kJ

B) 462,kJ

C) 1365,kJ

D) +2730,kJ

Show Answer

Answer:

Correct Answer: B

Solution:

  • 2Al+32O2Al2O3,ΔH=1596kJ …..(i) 2Cr+32O2Cr2O3,,ΔH= 1134kJ …….(ii) By (i)-(ii) 2Al+Cr2O32Cr+Al2O3,ΔH=462kJ.


जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक