Question
The ionization enthalpies of lithium and sodium are 520 kJ/mole and 495 kJ/mole respectively. The energies required to convert all the atoms present in 7 mg of lithium vapours and 23 mg of sodium vapours to their respective gaseous cations respectively are?
Answer: Option B
:
B
Number of moles of Li = 7×10−37 = 10−3
Number of moles of Na= 23×10−323 = 10−3
The amount of energy required for 1 mole of Li = 520 kJ.
For10−3 of Li = 250 ×10−3 = 520 J
The amount of energy required for 1 mole of Na = 495 kJ.
For10−3 of Na = 495 ×10−3 = 495 J
Was this answer helpful ?
:
B
Number of moles of Li = 7×10−37 = 10−3
Number of moles of Na= 23×10−323 = 10−3
The amount of energy required for 1 mole of Li = 520 kJ.
For10−3 of Li = 250 ×10−3 = 520 J
The amount of energy required for 1 mole of Na = 495 kJ.
For10−3 of Na = 495 ×10−3 = 495 J
Was this answer helpful ?
More Questions on This Topic :
Question 4. Which one of the following is incorrect?....
Question 6. For the processes K+(g) I⟶ K(g) II⟶K−(g)....
Question 7. Representative elements belong to....
Question 10. Which of the following is wrong?....
Submit Solution