Question

Calculate the mass of calcium carbide produced if 1770 kJ of heat is absorbed.

Answer 1

Answer:

$m=243.72g$

Explanation:

Hello,

For the given chemical reaction:

$CaO(s) + 3 C(s) \rightarrow CaC_2(s) + CO(g)$

Whose heat of reaction is 464.8 kJ/mol which means that energy is absorbed due to the chemical reaction, we can compute the moles of calcium carbide via the following relationship:

$n=\frac{1770kJ}{464.8 kJ/mol}\\ \\n=3.81mol$

Then, since the molar mass of calcium carbide is 64 g/mol, the yielded mass turns out:

$m=3.81mol*\frac{64g}{1mol}\\ \\m=243.72g$

Best regards.