Consider the reaction represented by the equation. 2NaHCO3(s) \(\rightarrow\) 2Na2CO 3(S) + CO 2(g) + H2O(g) what volume of carbon (IV)oxide at s.t.p is evolved when 0. 5 moles of NaHCO3 is heated? [Molar volume = 22.4 dm3 at s.t. p]
a
1.12dm3
b
2.24dm3
c
5.6dm3
d
56.0dm3
Explanation
Correct Option
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montty
10 years ago
The ans is C
From the reaction,
2moles of NaHCO3--1mole of CO2
But 1mole of any gas occupies 22.4dm3 at STP,let x be the volume when its 0.5mol therefore
2mol ---22.4dm3
0.5mol--x
Cross multiply
2x=0.5*22.4
2x=11.2
X=11.2/2
X=5.6 dm3

