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Calculate delta H° for the reaction , Ca...

Calculate delta H° for the reaction , `CaC_2(s) + 2H_2O(l) rarr Ca(OH)_2(s) + C_2H_2(g)` , `delta H°_(f(CaC_2)) = -62.0 kj/mol `,`delta H°_(f(H_2O)) = -286.0 kj/mol` ,`delta H°_(f(CaOH_2)) = -986.0 kj/mol `,`delta H°_(f(C_2H_2)) = -227.0 kj/mol` ,

A

`+122 kj/mol`

B

`-722 kj/mol`

C

`+579 kj/mol`

D

-579 kj/mol`

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AAKASH INSTITUTE ENGLISH-TEST 5-EXAMPLE
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