1.

Given the following thermochemical equations, Zn+(1)/(2)O_(2) to ZnO+84,000 cal Hg+(1)/(2)O_(2)toHgO+21,700 cal Accordingly the heat of reaction for the following reaction, Zn+HgO to Hg+heat is

Answer»

105700 cal
61000 cal
10500 cal
623000 cal

Solution :`ZN+(1)/(2)O_(2)to ZnO+84000` cal
`underline(""HgO to Hg+(1)/(2)O_(2)-21700cal"")`
`Zn+HgO to ZnO+Hg+(84000-21700)cal`
So, HEAT of FORMATION of the REACTION
`Zn+HgO to Hg,`
`=(84000-21700)cal=62300cal`


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