Question

For the following combustion, what mass of carbon dioxide is produced when 1500 kJ of energy is released?
2 C2H6(g) +7 O2(g) --- 4CO2(g) + 6 H2O + 2502 kJ

Answer 1

Question#18442

For the following combustion, what mass of carbon dioxide is produced when 1500 kJ of energy is released?

2 C2H6(g) + 7 O2(g) --- 4CO2(g) + 6 H2O + 2502 kJ

Solution:

Find molar mass of $CO_{2}$: $M(CO_{2}) = M(C) + 2 * M(O) = 12 + 12 * 6 = 44 \, \text{g/mol}$

According to equation:

$$4 \, \text{mol} \, (CO_2) = 4 * 44 \, \text{g} \Rightarrow 2502 \, \text{KJ}$$ $$x \, \text{mol}(CO_2) = x \, \text{g} \Rightarrow 1500 \, \text{KJ}$$ $$x = \frac{4 * 44 * 1500}{2502} = 105.5156 \, \text{g}$$

Answer: $\approx 105.52 \, \text{g}$