IIT JAM
   Top Resources
profile-img
Anuradha Bhogaonkar posted an Question
May 11, 2020 • 17:19 pm 30 points
  • IIT JAM
  • Chemistry (CY)

The following sequence of reaction occurs in commercial production of aqueous nitric acid. 4nh,(g)+50, (g) 4no(g) + 6h,o0) ah=-904kj.1) 3no, (g)+h,o0)2hno, (aq)

The following sequence of reaction occurs in commercial production of aqueous nitric acid. 4NH,(g)+50, (g) 4NO(g) + 6H,O0) AH=-904kJ.1) 3NO, (g)+H,O0)2HNO, (aq)+NO(g) AH=-140kJ.) Determine the total heat liberated (in kJ/mol) at constant pressure for the production of exactly 1 mole of aqueous nitric acid from NH3 by this process. 2NO(g)+0,(g) 2NO, (g) AH=-112kJ ..(2) a.(A) 986 b.(B) 493 c. (C) 246.5 d.(D) None of these

1 Answer(s) Answer Now
  • 0 Likes
  • 4 Comments
  • 0 Shares
  • comment-profile-img>
    Dinesh khalmaniya 1 best-answer

    yeh option b is correct.. here negative charge showing that it is exothermic reaction

    eduncle-logo-app

    yes sir

  • comment-profile-img>
    Dinesh khalmaniya 1

    Multiply the first equation by 3, the second by 6, and the third by 4: 12 NH3(g) + 15 O2(g) → 12 NO(g) + 18 H2O(l) ΔH = −2721 kJ 12 NO(g) + 6 O2(g) → 12 NO2(g) ΔH = −678 kJ 12 NO2(g) + 4 H2O(l) → 8 HNO3(aq) + 4 NO(g) ΔH = −556 kJ Add up all three equations: 12 NH3(g) + 15 O2(g) + 12 NO(g) + 6 O2(g) + 12 NO2(g) + 4 H2O(l) → 12 NO(g) + 18 H2O(l) + 12 NO2(g) + 8 HNO3(aq) + 4 NO(g) ΔH = −2721 kJ − 678 kJ − 556 kJ Cancel like amounts on opposite sides of the arrow, combine amounts of O2 on the same side of the arrow, and do the arithmetic for ΔH: 12 NH3(g) + 21 O2(g) → 14 H2O(l) + 8 HNO3(aq) + 4 NO(g) ΔH = −3955 kJ (1 mole HNO3(aq)) x (−3955 kJ/8 mol HNO3(aq)) = −494 kJ

whatsapp-btn

Do You Want Better RANK in Your Exam?

Start Your Preparations with Eduncle’s FREE Study Material

  • Updated Syllabus, Paper Pattern & Full Exam Details
  • Sample Theory of Most Important Topic
  • Model Test Paper with Detailed Solutions
  • Last 5 Years Question Papers & Answers

Sign Up to Download FREE Study Material Worth Rs. 500/-