1). Acetylene is the substance burned in oxy-acetylene torches. Write a balanced

Question

1). Acetylene is the substance burned in oxy-acetylene torches. Write a balanced equation for the complete oxidation reaction that occurs when acetylene (C2H2) burns in air. Use the smallest possible integer coefficients. _____ + _____ ---> _____ + ______

2).Ethylene is a very combustible gas. Write a balanced equation for the complete oxidation reaction that occurs when ethylene (C2H4) burns in air. Use the smallest possible integer coefficients. _____ + _____ -----> _____ + _____

3). When HBr(g) reacts with Cl2(g) to form HCl(g) and Br2(g), 9.70 kcal of energy are evolved for each mole of HBr(g) that reacts. Write a balanced equation for the reaction with an energy term in kcal as part of the equation. Use the SMALLEST INTEGER coefficients possible and put the energy term in an appropriate box. If a box is not needed, leave it blank. _____ + _____ + ____ -----> ____ + ____ + ____

4).When C2H4(g) reacts with H2O(g) to form CH3CH2OH(g), 10.9 kcal of energy are evolved for each mole of C2H4(g) that reacts. Write a balanced equation for the reaction with an energy term in kcal as part of the equation. Use the SMALLEST INTEGER coefficients possible and put the energy term in an appropriate box. If a box is not needed, leave it blank. _____ + _____ + ______ ----> _____ + _____ + ______

Explanation / Answer

1. 2C2H2(g) + 5O2(g)----------> 4Co2(g) + 2H2O(g)

2. C2H4(g) + 3O2(g)------------> 2CO2(g) + 2H2O(g)

3. 2HBr (g) + Cl2(g) -------> 2HCl(g) + Br2 +19.4KCal

4. C2H4(g) + H2O(l) -------> CH3-CH2OH +10.9KCal

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