When 1 mol of potassium chlorate crystals, KClO3, decompose…

When 1 mol of potassium chlorate crystals, KClO3, decompose to potassium chloride crystals and oxygen gas at constant temperature and pressure, 39.0 kJ of heat is given off.  Write a thermochemical equation for this reaction. [Make sure to use subscripts and superscripts where applicable.  If you need any Greek symbols or arrows,  they are located in the math equation (square root symbol) in the tool bar immediately above this question.]

The decomposition of iodine pentafluoride be represented by…

The decomposition of iodine pentafluoride be represented by the equation:     IF5(g)  →  IF3(g) + F2(g)  ΔH = ? Use the following information to find ΔH for the reaction above.     IF(g)  + F2(g) →  IF3(g)   ΔH = -390. kJ     IF(g)  + 2F2(g) →  IF5(g)   ΔH = -745 kJ