A gas of 3.4 moles occupies of a volume of 25 Liters. How many moles will occupy 50 Liters?

n₂ =  6.8 mol

Explanation:

Given data:

Initial number of moles = 3.4 mol

Initial volume = 25 L

Number of moles = ?

Final volume = 50 L

Solution:

According to Avogadro law,

V₁/n₁  = V₂/n₂

Now we will put the values in formula.

25 L/3.4 mol = 50 L/ n₂

n₂ = 50 L× 3.4 mol/25 L

n₂ = 170 L.mol/25 L

n₂ =  6.8 mol

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.