Science
10th Grade
NGSS covered
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25 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The average bond enthalpies for O-O and O=O are 146 and 496 kJ/mol respectively. What is the enthalpy change, in kJ, for the reaction below?
H-O-O-H(g) → H-O-H(g) + ½O=O(g)
-102
+102
+350
+394
Tags
NGSS.HS-PS1-4
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
For the reaction 2H2(g) + O2(g) → 2H2O(g) the bond enthalpies (in kJ/mol) are H-H = x, O=O = y, O-H = z Which calculation will give the value, in kJ/mol, of ΔH for the reaction?
2x + y - 2z
4z - 2x - y
2x + y - 4z
2z - 2x - y
Tags
NGSS.HS-PS1-4
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Using the table of average bond energies below the image, the ΔH for the reaction in kJ is.....
+ 160 kJ
-63 kJ
- 160 kJ
-217 kJ
Tags
NGSS.HS-PS1-4
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When new chemical bonds form, energy ____________.
is taken into the system.
is released from the system.
stays the same in the system.
Tags
NGSS.HS-PS1-4
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
What is the average bond energy of H-H ?
(a)
Tags
NGSS.HS-PS1-4
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
What is the average bond energy of C-H ?
(a)
Tags
NGSS.HS-PS1-4
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
What is the average bond energy of N-Cl ?
(a)
Tags
NGSS.HS-PS1-4
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