2H2 (g) O2 (g) --> 2H2O (g) if 44 g of O2 are reacted , determine the amount if heat transferred in the reaction when the Heat = -483.6 kJ
To determine the amount of heat transferred in the reaction, we need to use the concept of stoichiometry. Stoichiometry allows us to relate the amounts of reactants and products in a chemical equation.
First, let's calculate the number of moles of O2 using its molar mass:
Molar mass of O2 = 32 g/mol
Number of moles of O2 = Mass of O2 / Molar mass of O2
= 44 g / 32 g/mol
= 1.375 mol
From the balanced chemical equation, we can see that for every 1 mole of O2 reacted, 483.6 kJ of heat is transferred. So, we can set up a proportion:
1.375 mol O2 483.6 kJ
-------------- = --------------
1 mol O2 x
Solving for x, we can find the amount of heat transferred:
x = (1.375 mol O2 * 483.6 kJ) / 1 mol O2
= 665.7 kJ
Therefore, the amount of heat transferred in the reaction is 665.7 kJ.
To determine the amount of heat transferred in the reaction, we can use the concept of stoichiometry and the given molar heat of the reaction.
The balanced equation for the reaction is:
2H2 (g) + O2 (g) → 2H2O (g)
From the balanced equation, we can see that 1 mole of O2 reacts to produce 2 moles of H2O. We need to find the number of moles of O2 reacted in order to calculate the amount of heat transferred.
The molar mass of O2 is approximately 32 g/mol. Therefore, the number of moles of O2 can be calculated as follows:
moles of O2 = mass of O2 / molar mass of O2
moles of O2 = 44 g / 32 g/mol
moles of O2 = 1.375 mol
Now that we know the number of moles of O2 reacted, we can use the stoichiometry of the reaction to calculate the amount of heat transferred.
From the balanced equation, we can see that for every 2 moles of H2O produced, -483.6 kJ of heat is transferred. Therefore, for 1 mole of O2 reacted:
Amount of heat transferred = (moles of O2 / 2) * -483.6 kJ
Amount of heat transferred = (1.375 mol / 2) * -483.6 kJ
Amount of heat transferred = -334.05 kJ
Therefore, the amount of heat transferred in the reaction when 44 g of O2 are reacted is approximately -334.05 kJ. Note that the negative sign indicates that the reaction is exothermic, meaning heat is released during the reaction.