Anonymous
Anonymous asked in Science & MathematicsChemistry · 9 years ago

Thermochemistry, aid needed!?

How much heat is necessary to get 150.0ml of water at 50.0 degrees celsius to form into steam at 100 degrees Celsius?

I derived 12750 Joules, significant numbers not applied. Is this correct

Update:

And in the case that temperature change is zero in a thermochemistry equation, would you just not include it. (q=C X g X deltaT)?

1 Answer

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  • 9 years ago
    Favorite Answer

    Hi Mark,

    Cw = 4,184 J/g

    Lf = 2256 J/g

    Q = m x C x (Tf - Ti) + Lf x m

    Q = 150 x 4,184 x (100 - 50) + 2256 x 150

    Q = 369780 J

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