Chemistry

At 1 atm, how much energy is required to heat 35.0 g of H2O(s) at –12.0 °C to H2O(g) at 127.0 °C?

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  1. Do this in steps and add each step to find total q.
    1. Within a phase the formula is
    q = mass x specfic heat x (Tfinal-Tinitial).
    For example to heat 20g liquid water at zero C to 100 C (all in the same phase)
    q = 20 x specific heat x (100-0) = ?

    2. At the phase change (solid to liquid or liquid to vapor) it is
    q = mass x heat fusion at freezing point or
    q = mass x heat vaporization at the boiling point.
    Then add the q values together to find the total.

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