The balanced equation for combustion in an acetylene torch is shown below: 2 upper C subscript 2 upper H subscript 2 plus 5 upper O subscript 2 right arrow 4 upper C upper o subscript 2 plus 2 upper H subscript 2 upper O. The acetylene tank contains 35.0 mol C2H2, and the oxygen tank contains 84.0 mol O2. How many moles of O2 are needed to react completely with 35.0 mol C2H2? mol O2

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

what is the question?

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.