When 13.0 g of acetylene, C2H2, undergoes complete combustion, 65.5 kJ of heat are released. a) How much energy is released when one mole of acetylene is burned?

b) Write a balanced chemical equation for the reaction and include the heat value in the equation.

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.