A 1.00 g sample of NH 4 NO 3 is decomposedin a bomb calorimeter. The temperature

Question

A 1.00 g sample of NH4NO3 is decomposedin a bomb calorimeter. The temperature increases by 6.12°C.What is the molar heat of decomposition for ammonium nitrate? Molar mass, NH4NO3 80.0 g/mol Calorimeter Constant   1.23 kJ/°C Please EXPLAIN youranswer. A 1.00 g sample of NH4NO3 is decomposedin a bomb calorimeter. The temperature increases by 6.12°C.What is the molar heat of decomposition for ammonium nitrate? Molar mass, NH4NO3 80.0 g/mol Calorimeter Constant   1.23 kJ/°C Please EXPLAIN youranswer.

Explanation / Answer

Heat gained by the calorimeter (Q1) = Heatlost by the decomposition of NH4NO3 (Q2)

Q1 = C . T
Q1 = (1.23 kJ/K)(6.12 K) = 7.53 kJ

Molar mass of NH4NO3 = 80 g/mol
** 1 g NH4NO3 decomposed, 7.53 kJ of heatis released
** 80 g which is 1 mol NH4NO3 decompose, the heat will be;
(80 g/mol x 7.53 kJ) / 1 g = 602.4 kJ/mol is the molar heat ofdecomposition for ammonium nitrate.

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