Chemistry

posted by .

Given the reaction 2 Na2 02 (s) + 2 H2o(i) —- 4 NaOH(s) + 02(g) triangle H= -109 KJ

determine the following reactions.
16 Na2o2(s)+ 16 H2o(i)———- 32 NaOH(s) + 8 O2(g)
2 NaOH(s)—-+ 1/2 o2(g)——-Nao2(s)+ H2o(I)

  • Chemistry -

    You really need to be more careful with your typing. I have an excuse when I make typos and omit characters; I'm old and can't see very well. You don't have that excuse. You're in a hurry. You can't hurry your way through chemistry. :-).
    Equation 1 has dH = -109 kJ.
    Look at equation 2. That is just 8x the first one; therefore dH must be 8*-109 kJ.

    Look at equation 3. That one is 1/2 of the reverse of equation 1; therefore, dH is (1/2*-109 kJ) then change the sign since the equation is reversed. Note you made a typo here. I think you meant Na2O2(s)

  • Chemistry -

    My apologies. I will type it over.

  • Chemistry -

    Given the reaction 2 Na2 02 (s) + 2 H2o(i) —- 4 NaOH(s) + 02(g)

    I couldn't make out the symbol however its triangle H= -109 KJ

    determine the following reactions.
    1. 16 Na2o2(s)+ 16 H2o(i)———- 32 NaOH(s) + 8 O2(g)
    2. 2 NaOH(s)———— + 1/2 o2(g)——-Nao2(s)+ H2o(I)

  • Chemistry -

    The triangle is the Greek for delta.

  • Chemistry -

    Ok. I retyped the question straight from the book.hopefully its correct now.

  • Chemistry -

    Thanks. My answer stays the same. But I still think that last NaO2 is Na2O2. NaO2 doesn't make sense with the rest of the problem.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry II

    Calculate the change in heat: 2 Na(s) + 2 H2O(l) > 2 NaOH(aq) + H2(g) So far this is what I have: 2 H20 --> 2 H2 + O2 2(285.83) kJ 2 Na + O2 + H2 --> 2 NaOH 2(-426.73) kJ 2 Na + 2 H2O --> 2 NaOH + H2 -281.8 kJ If this correct?
  2. Chemistry

    I posted before about designing a procedure to determine two unknowns (1 solid, 1 solution). The possible solutions were: NaCl, CaCl2, CuSO4, NaOH,Ba(OH)2, HCl, HNO3, or H2O. The reagents given are: NaOH, HCl, AgNO3, Zn metal, Na2SO4, …
  3. Chemistry, reactions w/ water

    Write the equation for the reaction of each of the following with water. a) HCl b) CH3COOH c) NaOH d) NH3 Are these correct?
  4. Chemistry

    HCl(aq) + NaOH(aq) -> NaCl(aq) + H2O(l) NH4Cl(aq) + +NaOH(aq) -> NH3(aq) + NaCl(aq) + H2O(l) NH3(aq) + HCl(aq) -> NH4Cl(aq) Write net ionic equations for the three reactions. Show how the first two reactions are arranged algebraically …
  5. chemistry

    If it requires 30.0 milliliters of 1.2 molar HCl to neutralize 20.0 milliliters of NaOH, what is the concentration of the NaOH solution?
  6. chemistry

    Which one of the following is a combustion reaction?
  7. Chemistry

    Given the following equation: Na2O + H2O ---> 2 NaOH. How many grams of NaOH is produced from 1.20 x 10^2 grams of Na2O?
  8. chemistry

    In which of the following reactions is ΔE closest in value to ΔH?
  9. Chem

    Calculate the Keq of the reversible reactions Cr2O7 + 2OH -> CrO4 + H2O and 2CrO42->Cr2O72 , given the following data: HCrO4 -> H + CrO42 K = 3.2 x 10^-7 2HCrO4 -> Cr2O72 + H2O K = 34 H2O -> H+ + OH- K = 1 x 10^-14 HCL …
  10. chemistry

    Which of the following chemical reactions represents a neutralization reaction?

More Similar Questions