Question

The heat of combustion for ethane, C2H6, is 47.8 kJ/g. The amount of heat produced if 6.95 moles of ethane undergo complete combustion is:

a) 333.61 kJ
b) 332.71 kJ
c) 331.81 kJ
d) 330.91 kJ

Answer 1

The task was to calculate the heat produced by the combustion of 6.95 moles of ethane. Calculating the mass of ethane and multiplying by the given heat of combustion, we determined that none of the provided answer options correctly represents the heat yielded, suggesting a need to revisit the calculations or the question's provided options.

Step-by-step explanation:

The question asks for the amount of heat produced when 6.95 moles of ethane (C2H6) undergo complete combustion, given that the heat of combustion for ethane is 47.8 kJ/g. To find the answer, we need to calculate the total heat produced by using the molar mass of ethane and the given heat of combustion. The molar mass of ethane is approximately 30.07 g/mol.

First, we calculate the mass of 6.95 moles of ethane:
6.95 moles of C2H6 x 30.07 g/mol = 208.9865 g

Then we use the heat of combustion to find the total heat:
208.9865 g x 47.8 kJ/g = 9991.1267 kJ

Therefore, the correct choice from the given options would be one that is closest to the actual result of 9,991.1267 kJ, factoring in significant figures and the context of the question. However, since none of the answer options provided are correct, we should consider recalculating or checking our process for any errors.