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Given the experimental information below...

Given the experimental information below:
`2Sr(s) + O_(2)(g) rarr 2SrO(s), " "Delta_(r )H^(@) = -1180 kJ//mol`
`SrCO_(3)(s) rarr CO_(2)(g) + SrO(s) Delta_(r)H^(@) = 234 kJ//mol`
`2O_(2)(g) + 2C(s) rarr 2CO_(2)(g), " "Delta_(r )H^(@) = -788 kJ//mol`
Calculate the enthalpy change `Delta_(r) H^(@)` for the formation of 1.0 mol of strontium carbonate, the material that gives red color in fireworks, from its elements.
`Sr(s) + 3/2 O_(2)(g) + C("graphite") rarr SrCO_(3)(s)`.

A

`-740" Kj/mol"`

B

`+714" Kj/mol"`

C

`-1218" Kj/mol"`

D

`-2436" Kj/mol"`

Text Solution

Verified by Experts

The correct Answer is:
C
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