a sample consisting 22.7g of a nongasous unstable compound X is placed inside a metal cylinder with a radius of 8Cm and a piston is carefully placed on the surface of the compound so that for all practical purposes the distance between the bottom of the cylinder and the piston is zero the piston and cylinder apparatus is carefully placed in 10kg of water at 25 celsicius. the barometric pressure is 778 torr.
when the compound sspontaneoulsy decomposes the piston mov es up the temperature of the water reaches a max of 29.52 celcius and then it gradually decrease as the water loses heat to the surround air. the distance between the pistona nd the bottom of the cylinder, at the max temp is 59.8 cm chemical analysis shows the the cylinder contain .3mol carbon dioxide .25 mol liquid water and .025 mol oxygen gas, and an undetermined amount of a fasous element A
it is known that the enthalpy change for the decomposition of X, according to the reacion described above, is -1893kJ/mol X. the standard enthapies of formation for gasous carbon disxide and liquid water are -393.5 kJ/mol and -286kj/mol repectively. the heat capacity for water is 4.184J/celius*g the conversion factor between L*atm and Jcan be determined fro the two vaules for the gas constant, R, namely, .08206 L*atn/mol*K and 8.3145J/mol*k. the vapor oressure of water at 29.5celcius is 31torr. assume that the heat capacity of the piston and cylinder apparatus is negligible and that the piston has negaligible mass.
whatthe formula for X?
the pressure volume work for decomposition of 22.7g samole of X
the molar change in internal engery for the decompositn of X and the approximate standard enthalpy of formation for X?
Cn anyone help i don't have a clue how to start=\
1 answer