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Anonymous
Anonymous asked in Science & MathematicsChemistry · 1 month ago

can anyone help with Chem please? ?

How much heat is absorbed if a .122 g sample of water goes from 365 K to 367 K?

-1.02 J

+ 1.02 J

3.3 J

.055 J

How much heat is released when a 22 g sample of water cools from 32 C to 29 C? 

+ 276 calories

 - 2.8 x 10^2 joules 

+ 8.4 x 10^-2 joules 

- 3.3 x 10^1 joules

1 Answer

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  • 1 month ago
    Favourite answer

    (4.184 J/g·°C) x (0.122 g) x (367 - 365)°C = +1.02 J

    (4.184 J/g·°C) x (22 g) x (32 - 29)°C = -276 J = -2.8 x 10^2 J

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