Question

The general combustion equation for any alkane is given by the following equation: \(C_nH_{2n+2} + X O_2 \to nCO_2 + (n+1) H_2O\). What is the value of ‘X’ in the above equation?

• A. \((n+1)/2\)
• B. \((2n+1)/2\)
• C. \((2n+2)/2\)
• D. \((3n+1)/2\)
• E. \((4n+1)/2\)

Hint:

For any hydrocarbon \(C_xH_y\), the balanced oxygen coefficient is always \(x + y/4\). For alkanes, \(x=n\) and \(y=2n+2\). So, \(n + (2n+2)/4 = n + (n+1)/2 = (3n+1)/2\).

Answer 1

The Correct Option is D