Constants I Periodic Table Part A Calculate the enthalpy change, AH, for the process in which 41.2 g of water is converted from liquid at 17.5 °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 H20(1). Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HA ? AH = Value kJ

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O * ?
* 4)) 67% O
Fri Mar 26 2
A session.masteringchemistry.com
<CH 07 HW
* Enthalpy of a Phase Change
<) 4 of 10 ( >
co
Constants I 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.
Calculate the enthalpy change, AH, for the process in which 41.2 g of water is converted from liquid
at 17.5 °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 H2 0(1).
Heat can also be transferred at a constant
Express your answer to three significant figures and include the appropriate units.
temperature when there is a change in state. For a
process that involves a phase change
> View Available Hint(s)
q =n. AH
where, n is the number of moles and AH is the
enthalpy of fusion, vaporization, or sublimation.
HA
?
The following table provides the specific heat and
enthalpy changes for water and ice.
Value
kJ
ΔΗ-
Specific heat
ΔΗ
Substance
[J/(g-°C)]
(kJ/mol)
water
4.18
44.0
Submit
Previous Answers
ice
2.01
6.01
X Incorrect; Try Again; 3 attempts remaining
Part B
How many grams of ice at -9.1 °C can be completely converted to liquid at 5.7 °C if the available
How many joules are th
15
3
MAR
26
How do you convert 338
D00
000
F4
esc
F1
F2
F3
F5
F6
F7
F8
F9
F10
23
&
24
Transcribed Image Text:Safari File Edit View History Bookmarks Window Help O * ? * 4)) 67% O Fri Mar 26 2 A session.masteringchemistry.com <CH 07 HW * Enthalpy of a Phase Change <) 4 of 10 ( > co Constants I 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. Calculate the enthalpy change, AH, for the process in which 41.2 g of water is converted from liquid at 17.5 °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 H2 0(1). Heat can also be transferred at a constant Express your answer to three significant figures and include the appropriate units. temperature when there is a change in state. For a process that involves a phase change > View Available Hint(s) q =n. AH where, n is the number of moles and AH is the enthalpy of fusion, vaporization, or sublimation. HA ? The following table provides the specific heat and enthalpy changes for water and ice. Value kJ ΔΗ- Specific heat ΔΗ Substance [J/(g-°C)] (kJ/mol) water 4.18 44.0 Submit Previous Answers ice 2.01 6.01 X Incorrect; Try Again; 3 attempts remaining Part B How many grams of ice at -9.1 °C can be completely converted to liquid at 5.7 °C if the available How many joules are th 15 3 MAR 26 How do you convert 338 D00 000 F4 esc F1 F2 F3 F5 F6 F7 F8 F9 F10 23 & 24
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