1. Questions

Chemistry

Calculate Delta H for 4NH3 + 5O2 --> 4NO + 6H2O
using:
N2 +O2 --> 2NO DH= -180.5 kJ
N2 + 3H2 --> 2NH3 DH= -91.8 kJ
2H2 + O2 --> 2H2O DH= -483.6 kJ

  1. 👍
  2. 👎
  3. 👁
Taylor

  1. Hess' Law.
    Multiply equation 2 by 2 and reverse it.
    Multiply equation 3 by 3 and leave as is.
    Multiply equation 1 by 2 and leave as is.
    Add the resulting equations.
    Add the resulting delta Hs also, (after multipling AND changing the sign of those reversed.

    1. 👍
    2. 👎
    DrBob222

  2. -1628.2

    1. 👍
    2. 👎
    Jose

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Samples of NH3 and 02 are placed in a rigid container. When the equilibrium below is established, the partial pressure of H2O is 0.784 atm. What is the partial erasure of NO when the system is at equilibrium? 4NH3 + 5O2 -----> 4NO

  2. chemistry

    4NH3(g)+5O2(g) yield 4NO(g)+6H2O(g) Deduce the equilibrium constant expression for the reaction.

  3. Chemistry

    given the balanced equation representing a reaction: 4NH3+5O2-->4NO+6H2O what is the minimum number of moles of O2 that are needed to completely react with 16 moles of NH3? (1)16 mol (2)20.mol (3)64 mol (4)80. mol i think its 2

  4. Chemistry

    Given the reaction: 4NH3+5O2--->4NO+6H2O When 1.20 moles of ammonia reacts, the total number of moles of products formed is: ?

  1. stoichiometry

    Ammonia gas reacts with oxygen gas according to the following equation: 4NH3 + 5O2----4NO + 6H2O a. How many moles of oxygen gas are needed to react with 23 moles of ammonia? (29 mole) b. How may grams of NO are produced when 25

  2. Chemistry

    for the reaction 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g) if H = -950kJmol-1, does that mean it's an exothermic reaction? Ooops pressed Post too quickly. Yes it is exothermic. Delta H is negative so heat is lost from the system. If delta

  3. Chemistry 30

    Consider the following reaction at equilibrium: 4NH3(g) + 5O2(g) ↔ 4NO(g) + 6H2O(g) In what direction will the following changes force the reaction? a) Addition of O2 b) Reduction of the amount of water vapour c) Increase in the

  4. Chemistry

    4NH3+5O2 = 4NO + 6 H20 If a container were to have 10 molecules of O2 and 10 molecules of NH3, initially, how many total molecules (reactants plus products) would be present in the container after this reaction goes to completion?

  1. chemistry

    1. A solution of sodium oxalate has a pH of 7.82. The [OH-] in mol/L must be which of the following: a) 6.18 b) 1.5 x 10-8 c) 6.6 x 10-7 d) 7.82 e) -7.82 2. When 0.93 mol of O2 and 0.56 mol of NH3 are mixed together and allowed to

  2. Chemistry

    The equilibrium constant for the reaction 2NO(g) + O2(g) 2NO2(g) is Kp=1.48x10^4 at 184C. Calculate Kp for 2NO2(g) 2NO(g) + O2(g). I know the equation is Kp=Kc(RT)x Delta n Kp is what we're solving for Kc= I can't seem to find.

  3. Chemistry

    Nitric acid can be produced from NH3 in three steps process: I)4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) II)2NO(g) + O2(g) → 2NO2(g) III)3NO2(g) + H2O(l) →2HNO3(aq) + NO(g) % yield of Ist, IInd & IIIrd are respectively 50 % , 60 %

  4. chemistry

    4NH3 + 5O2 → 4NO + 6H2O 2NO + O2 → 2NO2 3NO2 + H2O → 2HNO3 + NO In this process, the NO made in the last reaction is recycled back into the second reaction and used as a reactant. In the end, all of the NO produced is

You can view more similar questions or ask a new question.