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When 12.0g of C reacted with a limited q...

When `12.0g` of `C` reacted with a limited quantity of oxygen, `57.5 kcal `of heat was produced. Calculate the number of `CO` and number of moles of `CO_(2)` produced.
Given `C +O_(2) rarr CO_(2), Delta_(f)H = - 94.05 kcal`
`C +1//2O_(2) rarr CO, Delta_(f)H =- 21.41 kcal `

A

0.5 mol

B

0.46 mol

C

0.64 mol

D

0.74 mol

Text Solution

Verified by Experts

The correct Answer is:
A
`12g C=1` mole, suppose CO produced `=x` moles.
Then `CO_(2)` produced `=(1-x)` mole
`:. X(-21.41)+(1-x)(-94.05)= -57.5`
This on solving gives `x=0.54` mole.
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