How much heat transfer (in kJ) is necessary to raise the temperature of a 0.150 kg...
How much heat transfer (in kJ) is necessary to raise the temperature of a 0.150 kg piece of ice from −18.0°C to 128°C, including the energy needed for phase changes? (Assume the substance remains at a constant volume throughout each stage of the heating process.)
Homework Answers
total heat require
= for changing the temp from - 18 to 0
+ for change its state from ice to water
+ change its temp from 0 to 100
+ change its state from water to steam
+ change its temp from 100 to 128
= m Ci ( 18 - 0) + mLf + m Cw (100) + m Lv + m Cs (28)
= 0.15 * ( 2.108* 18 + 334 + 4.186* 100 + 2230 + 1.996* 28)
= 461.4648 kJ
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