chemistry

If you need to multiply the following reaction by 2 to be an intermediate reaction in a Hess's law problem, what would be the final value for the enthalpy of reaction you use for this intermediate reaction? C2H4 + 3 O2 2 CO2 + 2 H2O, H = -1410 kJ

  1. 👍
  2. 👎
  3. 👁
  1. It works this way. If you multiply the equation you use the same multiplier for dH. If you reverse the equation, change the sign of dH. If you reverse the equation AND multiply it, then multiply by the same multiplier and change the sign.

    1. 👍
    2. 👎
  2. 2820 kj

    1. 👍
    2. 👎
  3. -2820 kj

    1. 👍
    2. 👎
  4. The answers -2820 kj (APEX)

    1. 👍
    2. 👎
  5. 1410kJ (Apex)

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. science

    what type of reaction is this 2h2o2 (l) -> 2h2o(l)+ o2 (g) a.single replacement reaction. b.decomposition reaction. c.acid-base neutralization reaction. d.no reaction.

  2. Chemistry

    1.) The the following reaction is: BaCO3 --> BaO + CO2 Decomposition reaction Single replacement reaction Combustion Reaction Synthesis Reaction Double replacement reaction 2.) When magnesium is burned in the presence of oxygen,

  3. Chemistry - Science (Dr. Bob222)

    The following reaction has a positive value of ΔG°. 2H2O(g) → 2H2(g) + O2(g) Which of the following statements must be true? A. The reaction is slow. B. The reaction will not occur. That is, when H2O(g) is introduced into a

  4. Chemistry-rate laws

    1. Determine the overall reaction order for the reaction whose rate law is as follows: rate=k[O3][ClO]: a. 0 b. 1 c. 2 *** d. 3 2. For the reaction (A→2B) whose rate law is rate=k, which of the following will change the value of

  1. Chemistry

    Please help me with this-- I don't understand it. Calculate the change of enthalpy for the reaction 2Al (s) + 3Cl2 (g) --> 2AlCl3 (s) from the following reactions: Reaction 1: 2Al (s) + 6HCl (aq) --> 2AlCl3 (aq) + 3H2 (g);Change

  2. chemistry-balanced redox equations

    Use the following steps to balance the redox reaction below: Mg + Au+ Mg2+ + Au a. Write the oxidation and reduction half-reactions. Make sure each half-reaction is balanced for number of atoms and charge b. Multiply each

  3. Science

    Hydrogen peroxide can be prepared in several ways. One method is the reaction between hydrogen and oxygen, another method is the reaction between water and oxygen. Calculate the ΔG°rxn of each reaction below? 1) H2(g) + O2(g)

  4. Chemistry Help!!

    Types of Reactions Worksheet Balance the following equations and indicate the type of reaction taking place: 1) 2 NH3 + 3 I2  N2I6 + 3 H2 Type of reaction: ____________________ 2) 3 Ca(OH)2 + Al2(SO4)3  3 Ca(SO4) + 2 Al(OH)3

  1. Chemistry

    The activation energy for a reaction is the energy difference between what two components of a reaction? product and the intermediate reactant and the intermediate reactant and the activated complex

  2. chemistry

    Which statement describes a chemical reaction at equilibrium? A. The forward reaction happens slightly faster than the reverse reaction. B. The reaction has stopped because all reactants have been used up. C. The forward reaction

  3. Chemistry

    What does adding a catalyst to a reaction do? Select all that apply. increase the amount of each product formed by the reaction lower the activation energy of the reaction (correct) alter the orientation of reactants in the

  4. chemistry

    Consider the following reaction: 2HBr(g)---> H_2(g) + Br_2(g) B)In the first 15.0s of this reaction, the concentration of HBr dropped from 0.510M to 0.455M. Calculate the average rate of the reaction in this time interval. C)If

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