q1 = heat to warm ice from -20 to zero but not melt it.
q1 = mass ice x specific heat ice x delta T (delta T = 20).
q2 = heat to melt ice at zero.
q2 = mass ice x heat fusion.
q3 = heat to raise temperature from zero for liquid water to 100 C.
q3 = mass water x specific heat water x delta T (100 is delta T).
q4 = heat to change water from liquid to steam at 100.
q4 = mass water x heat vaporization.
q5 = heat to raise steam from 100 to 125 C.
q5 = mass steam x specific heat steam x delta T.
Total energy is q1 + q2 + q3 + q4 + q5.
You will need to look up specific heat ice, specific heat water, specific heat steam, heat of fusion and heat of vaporization.
Post your work if you get stuck.
If 25 grams of solid ice at-20 degrees C is heated to gaseous water at 125 degrees C, how much energy is required?
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