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Reaction types

The purpose of a catalyst is well illustrated in this decomposition reaction of hydrogen peroxide into water and oxygen. Describe the entropy change of the reaction based on the video. Include the full reaction equation. H 2 O 2 → H 2 O + O 2.

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Reaction types

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  1. The purpose of a catalyst is well illustrated in this decomposition reaction of hydrogen peroxide into water and oxygen. Describe the entropy change of the reaction based on the video. Include the full reaction equation. H2O2 → H2O + O2

  2. Nitrogen triiodide is difficult to produce and is referred to as a shock explosive. Predict the entropy and enthalpy change for this reaction. Include the decomposition equation. NI3 → N2 + I2

  3. Determine the sign of the entropy change from the reaction between copper and nitric acid. Note the blue solution of copper(II) nitrate. Although you cannot see it, water is also a product. Give the reaction equation. Cu + HNO3→Cu(NO3)2 + H2O + NO2

  4. The reaction of barium hydroxide octahydrate and ammonium chloride can be used to demonstrate the varying degrees of an enthalpy change. Note the piece of wood used in this demo. Ba(OH)2 + NH4Cl → BaCl2 + H2O + NH3

  5. The ashy white product from the reaction of phosphorus and oxygen eventually cools enough to become a solid. Predict the entropy and enthalpy change for this reaction. P + O2 → P4O10

  6. Rarely will two solids react at room temperature. However, utilizing a special catalyst allows zinc and iodine to react. What will be the sign of the enthalpy change? Zn + I2 → ZnI2

  7. On May 6, 1937, the German zeppelin Hindenburg arrived in Lakehurst, New Jersey after completion of a transatlantic flight. The tragic fire that destroyed the zeppelin is one of the great disasters in the history of air travel. Thirty six would die in the tragedy, and the fire, hydrogen chemistry at its most powerful, would soon end the era of the zeppelin. H2 + O2 → H2O

  8. The “volcano” produced from the catalytic decomposition of ammonium dichromate using mercury(II) thiocyanate is somewhat unsettling because of its “snake” image. Determine the entropy change. (NH4)2Cr2O7→ H2O + Cr2O3 + N2

  9. The decomposition of potassium chlorate by means of heat provides an oxygen environment that is suitable for spontaneous combustion of hydrocarbons, sugars included. KClO3 → KCl + O2 C12H22O11 + O2 → H2O + CO2

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