S 9=msAT where g is heat in joules, m is mass in grams, is specific heat...
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S 9=msAT where g is heat in joules, m is mass in grams, is specific heat in joules per gram-degree Celsius, J/(g-C), and AT' is the temperature change in degrees Celsius. The heat energy associated with a change in phase at constant temperature is given by 9=mAH where g is heat in joules, m is mass in grams, and AH is the enthalpy in joules per gram. Physical constants The constants for H₂O are shown here: Specific heat of ice: Sice=2.09 J/(g-°C) Specific heat of liquid water: water 4.18 J/g °C) Enthalpy of fusion (H₂O(s)-H₂O(1)) AH-334 J/g • Enthalpy of vaporization (H₂O(1)-H₂O(g)) AH-2250 J/g Part A How much heat energy, in kilojoules, is required to convert 53.0 g of ice at -18.0°C to water at 25.0°C? Express your answer to three significant figures and include the appropriate units. % 5 μA T Value Units Submit Hints My Answers Give Up Review Part To G Part B How long would it take for 1.50 mol of water at 100.0 C to be converted completely into steam if heat were added at a constant rate of 17.0 J/x? Express your answer to three significant figures and include the appropriate units. 4 ^ 6 Y H MacBook Pro & ? 7 44 U ? 8 ( 9 TK O ) 0 F10 Resources previous | 6 of 25 | P F11 11 S 9=msAT where g is heat in joules, m is mass in grams, is specific heat in joules per gram-degree Celsius, J/(g-C), and AT' is the temperature change in degrees Celsius. The heat energy associated with a change in phase at constant temperature is given by 9=mAH where g is heat in joules, m is mass in grams, and AH is the enthalpy in joules per gram. Physical constants The constants for H₂O are shown here: Specific heat of ice: Sice=2.09 J/(g-°C) Specific heat of liquid water: water 4.18 J/g °C) Enthalpy of fusion (H₂O(s)-H₂O(1)) AH-334 J/g • Enthalpy of vaporization (H₂O(1)-H₂O(g)) AH-2250 J/g Part A How much heat energy, in kilojoules, is required to convert 53.0 g of ice at -18.0°C to water at 25.0°C? Express your answer to three significant figures and include the appropriate units. % 5 μA T Value Units Submit Hints My Answers Give Up Review Part To G Part B How long would it take for 1.50 mol of water at 100.0 C to be converted completely into steam if heat were added at a constant rate of 17.0 J/x? Express your answer to three significant figures and include the appropriate units. 4 ^ 6 Y H MacBook Pro & ? 7 44 U ? 8 ( 9 TK O ) 0 F10 Resources previous | 6 of 25 | P F11 11
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