Question

Exam Hydrogen peroxide, H202, is a colorless liquid whose solutions are used as bleach and an antiseptic. H2O2 can be prepared in a process whose overall change is H2(g) + O2(g) -H02(1 Calculate the enthalpy change using the following data: H2O2(1) - H20(1) +502 (8); AH = -98.0 kJ (1) 2H2(g) + O2(g) → 2H20(1): AH = -571.6 kJ (2) 5. What is the wavelength, in nanometer, of light emitted when the electron in a hydrogen atom undergoes a transition from level n = 6 to level n = 1? 6. Write the noble gas core electron configuration and draw the orbital diagram for the ground state arsenic atom.

Answer 1

5°әсе) 750 ) thаѕ ѕи - - че-оч. * *° 4е се) ; ли - -Сән-6 1 см, г. 1,

from 1, and (""; on neversing the reaction ", and adding with reaction ("l, by after dividing it with "2 lie finding Dh for one mole in and b mole of which s one mole yo. Therefor Al will also become half of the given value. A4 will 0 00 thog motio ; A4 =-9800 kJ. on reversing ect; the su value also changes its siso. no + by og → 49 ; AH:+98.0kJ ..:(", 242 + O2 + 2y (); 44 =-571.6 kJ Dividing by a y + 12 02 30 (eg, sh. 546. - 265.89 Dividi 2 ling

Finally on adding (14, and lo, до +4° — 5°, ди +43 ) 4 +, , , , ,и • •ях - 8L) — + 2 + 2а Coriginal rean) ди, + дна - +98 t -2 %s: 8 ) . - 287-8 E.