Question

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

Answer 1

`m=243.72g`

Step-by-step 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=(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*(64g)/(1mol)\\ \\m=243.72g`

Best regards.