Explosives are effective if they produce a large number of gaseous molecules as products. Nitroglycerin, for?

example, detonates according to the following equation:





4C3H5N3O9(s) » 12CO2(g) + 6N2 (g) + 10H2O (g) + O2 (g)





a. if 25.0 g of nitroglycerin explodes in a 10.0L rigid container, calculate the total pressure of all gases present assuming the temperature is 500 °C





b. A 2.27g sample of the explosive, nitroglycerin, C3H5(NO3)3 is allowed to explode in a bomb calorimeter at?


standard conditions. The amount of heat evolved is 15.1kJ. The explosion of nitroglycerin occurs according to the equation. Using the necessary data from your textbook, calculate Hf for nitroglycerin

Explosives are effective if they produce a large number of gaseous molecules as products. Nitroglycerin, for?
a. MW(C3H5N3O9) = 227 g/mol


(25.0 g) / (227 g/mol) = 0.110 moles C3H5N3O9, so by the stoichiometry of the reaction, the total number of moles of gas = (0.11 moles) (12 + 6 +10 +1) / 4 = 0.798 moles. So the pressure using the ideal gas law is:


P = nRT/V = (0.798 moles) (0.082 L-atm/K-mol) (773.15 K) / (10.0 L) = 5.07 atm.


b. Need the data from your textbook. Hess' Law should apply.