The specific heat capacity of solid iodine is 0.427 J/g⋅⋅oC.  Calculate the final temperature (°C) when 747.0 J of heat is added to a 186.5g sample of solid iodine initially at 13.3°C. Please use the correct significant digit

Chemistry by OpenStax (2015-05-04)
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Chapter5: Thermochemistry
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Problem 20E: A 45-g aluminum spoon (specific heat 0.88 J/g C) at 24 C is placed in 180 mL (180 g) of coffee at 85...
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The specific heat capacity of solid iodine is 0.427 J/g⋅⋅oC.  Calculate the final temperature (°C) when 747.0 J of heat is added to a 186.5g sample of solid iodine initially at 13.3°C. Please use the correct significant digit

 

I got my answer as 22.3; however, it is incorrect. I am a bit lost on why. 

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