Constants Periodic Table Heat, q. is energy transferred between a system and its surroundings. For a process that involves a temperature change Part A q= m- C AT where C, is specific heat and m is mass. Heat can also be transferred at a constant temperature when there is a change in state. For a process that involves a phase change Calculate the enthalpy change, AH, for the process in which 10.0 g of water is converted from liquid at 0.3 C to vapor at 25.0 C. For water, AHvap = 44.0 kJ/mol at 25.0 "C and C, = 4.18 J/(g- C) for H2O(1). Express your answer to three significant figures and include the appropriate units. 9=n AH where, n is the number of moles and AH is the enthalpy of fusion, vaporization, or sublimation. > View Available Hint(s) The following table provides the specific heat and enthalpy changes for water and ice. Specific heat ΔΗ (kJ/mol) AH = Value kJ Substance 4.18 44.0 water 2.01 6.01 Submit Previous Answers ice

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Constants Periodic Table
Heat, q, is energy transferred between a system
and its surroundings. For a process that involves a
temperature change
Part A
q= m C, AT
where C, is specific heat and m is mass.
Heat can also be transferred at a constant
temperature when there is a change in state. For a
process that involves a phase change
Calculate the enthalpy change, AH, for the process in which 10.0 g of water is converted from liquid at 0.3
C to vapor at 25.0 °C. For water, AHvap = 44.0 kJ/mol at 25.0 "C and C =4.18 J/(g- "C) for
H2O(1).
Express your answer to three significant figures and include the appropriate units.
g=n AH
where, n is the number of moles and AH is the
enthalpy of fusion, vaporization, or sublimation.
> View Available Hint(s)
The following table provides the specific heat and
enthalpy changes for water and ice.
Specific heat
AH
(kJ/mol)
Value
kJ
Substance
ΔΗ-
4.18
44.0
water
2.01
6.01
Previous Answers
Submit
ice
X Incorrect; Try Again; 27 attempts remaining
O1 8:35
Transcribed Image Text:Constants Periodic Table Heat, q, is energy transferred between a system and its surroundings. For a process that involves a temperature change Part A q= m C, AT where C, is specific heat and m is mass. Heat can also be transferred at a constant temperature when there is a change in state. For a process that involves a phase change Calculate the enthalpy change, AH, for the process in which 10.0 g of water is converted from liquid at 0.3 C to vapor at 25.0 °C. For water, AHvap = 44.0 kJ/mol at 25.0 "C and C =4.18 J/(g- "C) for H2O(1). Express your answer to three significant figures and include the appropriate units. g=n AH where, n is the number of moles and AH is the enthalpy of fusion, vaporization, or sublimation. > View Available Hint(s) The following table provides the specific heat and enthalpy changes for water and ice. Specific heat AH (kJ/mol) Value kJ Substance ΔΗ- 4.18 44.0 water 2.01 6.01 Previous Answers Submit ice X Incorrect; Try Again; 27 attempts remaining O1 8:35
Enthalpy of a Phase Change
28 of 42
Constants | Periodic Table
Heat, q, is energy transferred between a system
and its surroundings. For a process that involves a
temperature change
Part B
q= m· C, . AT
where C, is specific heat and m is mass.
How many grams of ice at -28.7 °C can be completely converted to liquid at 9.0 PC if the available heat for
this process is 5.99x103 kJ ?
Heat can also be transferred at a constant
temperature when there is a change in state. For a
process that involves a phase change
For ice, use a specific heat of 2.01 J/(g - °C) and AHus = 6.01KJ/mol.
Express your answer to three significant figures and include the appropriate units.
q=n. AH
where, n is the number of moles and AH is the
enthalpy of fusion, vaporization, or sublimation.
• View Available Hint(s)
The following table provides the specific heat and
HA
?
enthalpy changes for water and ice.
ΔΗ
Specific heat
[J/(g - °C)]
Units
Substance
Value
(kJ/mol)
O You have already submitted this answer. Enter a new answer.
No credit lost Try again.
water
4.18
44.0
ice
2.01
6.01
Submit
Previous Answers
Next>
Provide Feedback
VI 8:35
Transcribed Image Text:Enthalpy of a Phase Change 28 of 42 Constants | Periodic Table Heat, q, is energy transferred between a system and its surroundings. For a process that involves a temperature change Part B q= m· C, . AT where C, is specific heat and m is mass. How many grams of ice at -28.7 °C can be completely converted to liquid at 9.0 PC if the available heat for this process is 5.99x103 kJ ? Heat can also be transferred at a constant temperature when there is a change in state. For a process that involves a phase change For ice, use a specific heat of 2.01 J/(g - °C) and AHus = 6.01KJ/mol. Express your answer to three significant figures and include the appropriate units. q=n. AH where, n is the number of moles and AH is the enthalpy of fusion, vaporization, or sublimation. • View Available Hint(s) The following table provides the specific heat and HA ? enthalpy changes for water and ice. ΔΗ Specific heat [J/(g - °C)] Units Substance Value (kJ/mol) O You have already submitted this answer. Enter a new answer. No credit lost Try again. water 4.18 44.0 ice 2.01 6.01 Submit Previous Answers Next> Provide Feedback VI 8:35
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