Asked by laura
determine the total amount of energy required to heat 25g of ice at -18 C to steam at 125 C
Answers
Answered by
DrBob222
q1 = heat to increase T of ice @ -18 to zero C.
q1 = mass ice x specific heat ice x (Tfinal-Tinitial). Tfinal = 0, Tinitial = -18, 0-(-18) = +18
q2 = heat to melt ice @ zero C to liquid water @ zero C.
q2 = mass ice x heat fusion.
q3 = heat to raise temperature from zero C to 100 C.
q3 = mass water x specific heat water x (Tfinal-Tinitial).
q4 = heat to turn liquid water @ 100 C to steam @ 100 C.
q4 = mass water x heat vaporization.
q5 = heat to increase T of steam at 100 C to 125 C.
q5 = mass steam x specific heat steam x (Tfinal-Tinitial)
Total heat required = q1 + q2 + q3 + q4 + q5.
q1 = mass ice x specific heat ice x (Tfinal-Tinitial). Tfinal = 0, Tinitial = -18, 0-(-18) = +18
q2 = heat to melt ice @ zero C to liquid water @ zero C.
q2 = mass ice x heat fusion.
q3 = heat to raise temperature from zero C to 100 C.
q3 = mass water x specific heat water x (Tfinal-Tinitial).
q4 = heat to turn liquid water @ 100 C to steam @ 100 C.
q4 = mass water x heat vaporization.
q5 = heat to increase T of steam at 100 C to 125 C.
q5 = mass steam x specific heat steam x (Tfinal-Tinitial)
Total heat required = q1 + q2 + q3 + q4 + q5.
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