Answer to Question #100936 in General Chemistry for Zachary

Question

What volume of oxygen is required to produce 960cm3 of steam when reacted with excess hydrogen, both volumes at rtp?

Answer 1

1 mole of steam is equivalent to 22.4 litres of steam

So 960 cm³ of steam is 0.96/22.4 moles of steam

Reaction between hydrogen and oxygen producing steam is

2H₂ + O₂$\to$ 2H₂O

So for every mole of steam produced we need half moles of oxygen or in terms of volume we say that for every litres of steam produced we need half litres of oxygen

So here we are given that steam produced is 960 cm³ so we need oxygen half of the volume of steam produced which is 960/2 = 480cm³