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Heat

Heat. Heat: the transfer of between that Specific heat: a measure of needed to of of a substance by Unit: Change in heat = (mass)(specific heat)(∆ in temp) ∆Q = m c ∆T. Because of law of conservation of energy, c water = J /kg ° C

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Heat

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  1. Heat

  2. Heat: the transfer of between that • Specific heat: • a measure of needed toof of a substance by • Unit: • Change in heat = (mass)(specific heat)(∆ in temp) ∆Q = m c ∆T

  3. Because of law of conservation of energy, • cwater= J/kg °C • cice= J/kg °C

  4. Heat of fusion: quantity of needed per kilogram to (or to solidify a liquid) at a and • Change in heat = • ∆Q = mhf • Unit: • Heat of fusion for water: J/kg • Meaning it takes 3.35 x 105 J to change 1 kg of

  5. Heat of vaporization: needed per kilogram to (or liquefy a gas) at a constant and atmospheric • Change in heat = (mass)(heat of ) • ∆Q = mhv • Unit: J/kg • Heat of vaporization for water: • NOTE: water vapor is ; water vapor isfrom or ; steam is what you see when

  6. Hypothermia can occur if the body temperature drops to 35.0 °C, although people have been known to survive much lower temperatures. On January 19, 1985, 2-year-old Michael Trode was found in the snow near his Milwaukee home with a body temperature of 16.0 °C. If Michael’s mass was 10.0kg, how much heat did his body lose, assuming his normal body temperature was 37.0 °C? (chuman body = 3470 J/kg °C)

  7. Gus is cooking soup in his pot and finds that he has added too much water. If Gus needs to boil off 0.200 kg of water in order for his soup to have the correct consistency, how much additional heat must Gus add once the soup is boiling?

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