Calculate the enthalpy for this reaction: 2C(s) + H2(g) ---> C2H2(g) Given the following thermochemical equations: C2H2(g) + (5/2)02(g) ---> 2CO2(g) + H2O(l) C(s) + O2(g)---> CO2(g) H2(g) + (1/2)02(g) ---> H2O(l) AH° = ??? KJ AH-1299.5 kJ AH-393.5 kJ AH-285.8 kJ

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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.132QP
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Calculate the enthalpy for this reaction:
2C(s) + H2(g) ---> C2H2(g)
Given the following thermochemical equations:
C2H2(g) + (5/2)02(g) ---> 2CO2(g) + H2O(l)
C(s) + O2(g)---> CO2(g)
H2(g) + (1/2)02(g) ---> H2O(l)
• +226 kJ
-787 kJ
. -226 KJ
• +1572 kJ
• K2NO2
• KNO3
Which is the correct formula for the compound whose percent composition is shown?
K-38.62% O- 47.51% N-13.87%
• KNO2
• K4N1003
How many mL of 3.0 M HCI are needed to make 300.0 mL of 0.1 M HCI?
100.0 mL
10.0 mL
• 30.0 mL
.9.0 mL
What group has the highest electronegativity?
. Poor Metals
• Moderately active non-metals
• Metalloids
. Highly active non-metals.
A conversion factor
• is equal to one.
• is a ratio of equivalent measurements.
• does not change the value of the measurement.
all of the above.
How many electrons can fit on the second energy level?
• Two
AH = ??? kJ
• Eighteen
. Eight
• Thirty-Two
AH-1299.5 kJ
AH-393.5 kJ
AH = -285.8 kJ
Transcribed Image Text:Calculate the enthalpy for this reaction: 2C(s) + H2(g) ---> C2H2(g) Given the following thermochemical equations: C2H2(g) + (5/2)02(g) ---> 2CO2(g) + H2O(l) C(s) + O2(g)---> CO2(g) H2(g) + (1/2)02(g) ---> H2O(l) • +226 kJ -787 kJ . -226 KJ • +1572 kJ • K2NO2 • KNO3 Which is the correct formula for the compound whose percent composition is shown? K-38.62% O- 47.51% N-13.87% • KNO2 • K4N1003 How many mL of 3.0 M HCI are needed to make 300.0 mL of 0.1 M HCI? 100.0 mL 10.0 mL • 30.0 mL .9.0 mL What group has the highest electronegativity? . Poor Metals • Moderately active non-metals • Metalloids . Highly active non-metals. A conversion factor • is equal to one. • is a ratio of equivalent measurements. • does not change the value of the measurement. all of the above. How many electrons can fit on the second energy level? • Two AH = ??? kJ • Eighteen . Eight • Thirty-Two AH-1299.5 kJ AH-393.5 kJ AH = -285.8 kJ
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