Question

ead 6. The combustion of methylhydrazine (CHAN2), a liquid rocket fuel produces Na (), CO: (g), and HO ) N+2 CO +HO 0 2 CH N: )+O2 When 3.52 mL of methylhydrazine is combusted in a bomb calorimeter, the temperature of the calorimeter increases from 25.00 °C to 39.50 °C. In a separate experiment, the heat capacity of the calorimeter is measured to be 1.95 kJ/ °C. Calculate the heat of reaction for the combustion of a mole of CHAN Density of methylhydrazine is 0.88 g/mL (Hint: the heat is directly measured, not indirectly measured as in the experiment performed today)

Answer 1

9 = - (cal X AT '1.95 kJ/°C AT - 139.soc - 25.00°C = 14.50°C - - (1.95kJLC (14.50ch - 28. 275 kJ

mass Volume Density = mass mass of hydrazine Density & Volume 0.089/ml x 3.52ml - 3.1g. 46.18 hyd 3.19 hydrazine 96 18 hydrazine - 28-275 kJ - 28.275 kJ X 46.19 3.1g Le Molar mass of hydrazine 420.5 kJ