Chemistry

posted by .

Use the equations with the enthalpy information given below to calculate the ÄH° for the reaction:
S(s) + O2(g) --> SO2(g)

S(s) + 3/2 O2(g) --> SO3(g)
ÄH° = -395kJ

2 SO2(g) + O2(g) --> 2 SO3(g)
ÄH° = -198.2 kJ

  • Chemistry -

    1) S(s) + 3/2 O2(g) --> SO3(g)
    ÄH° = -395kJ

    2) 2SO2(g) + O2(g) --> 2 SO3(g)
    ÄH° = -198.2 kJ

    Multiply equation 1 by 2 and add to the reverse of equation 2. delta H values are multiplied by any multipliers and delta H values change their sign when the reaction is reversed.
    When you finish you will have the right equation EXCEPT it will be just twice what you want; therefore, divide everything by 2 including the delta H value.

  • Chemistry -

    How much heat is evolved when 320 g of SO2 is burned according to the chemical equation shown below?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Given the thermochemical equation SO2(g) + ½ O2(g) ---> SO3 (g) DH = -99.1 kJ calculate the enthalpy change (DH) when 89.6 g of SO2 is converted to SO3. 1. 69.3 kJ 2. -111 kJ 3. -139 kJ 4. 139 kJ 5. -69.3 kJ help plz
  2. chemistry

    Given the thermochemical equation SO2(g) + ½ O2(g) ---> SO3 (g) DH = -99.1 kJ calculate the enthalpy change (DH) when 89.6 g of SO2 is converted to SO3. 1. 69.3 kJ 2. -111 kJ 3. -139 kJ 4. 139 kJ 5. -69.3 kJ i got -139 kj but im …
  3. Chemistry

    Sulfur trioxide, SO3, is made from the oxidation of SO2, and the reaction is represented by the equation 2SO2 + O2 2SO3 A 25-g sample of SO2 gives 18 g of SO3. The PERCENT YIELD of SO3 is?
  4. chemistry

    Data: SO2(g)+ 1/2O2(gas)forms SO3(g)Delta H = -99.1 kJ. Given the above data, calculate the enthalpy change when 89.6 g of SO2 is converted to SO3. Is this a grams to moles conversion or what?
  5. Chemistry

    An equilibrium mixture of SO2, O2, and SO3 at 1000 K contains the gases at the following concentrations: [SO2] = 3.77 10-3 mol/L, [O2] = 4.30 10-3 mol/L, and [SO3] = 4.13 10-3 mol/L. Calculate the equilibrium constant, K, for the following …
  6. chemistry

    An equilibrium mixture of SO2,SO3 and O2 gases is maintained in a 11.5 L flask at a temp at which Kc=55.2 for the rxn: 2SO2 + O2 <> 2SO3. If the # of moles of SO2 and SO3 are =, how many moles of O2 are present?
  7. chemistry

    Data: SO2(g) + ¨öO2(g) ¡æ SO3 (g) ¥ÄH = -99.1 kJ Given the above data, calculate the enthalpy change ¥ÄH when 89.6 g of SO2 is converted to SO3.
  8. Chemistry

    At a particular temperature, 13.7 mol of SO3 is placed into a 3.9-L rigid container, and the SO3 dissociates by the reaction given below. 2 SO3(g) 2 SO2(g) + O2(g) At equilibrium, 3.8 mol of SO2 is present. Calculate K for this reaction.
  9. Chem

    At 930 K, Kp = 0.30 for the following reaction. 2 SO2(g) + O2(g)=>2 SO3(g) Calculate the equilibrium partial pressures of SO2, O2, and SO3 produced from an initial mixture in which the partial pressures of SO2 and O2 = 0.51 atm …
  10. Chemistry

    Enthalpy Change Given the following reactions: S(s) + O2(g) → SO2(g) ΔH = -297 kJ/mol SO2(g) + ½ O2(g) → SO3(g) ΔH = -141 kJ/mol Calculate the ΔH for the reaction: S(s) + 3/2O2(g) → SO3(g)

More Similar Questions