A Thermochemistry Knowledge Quiz
12 Questions
| Attempts: 102
Questions and Answers
- 1.Which of the following substances have zero value for their standard enthalpy of formation?
- A.
O2
- B.
H2O
- C.
ZnO
- D.
None of these
- 2.Calorie is equivalent to?
- A.
4.18 j
- B.
4.18 kJ
- C.
0.418 J
- D.
0.418 kJ
- 3.Enthalpy of neutralization of all the strong acids and strong basis has the same values due to?
- A.
The formation of salt and water
- B.
The formation of salt
- C.
The complete ionization of acids and bases
- D.
The combination of H+ and OH- ions to form water
- 4.Total heat content of a system is called?
- A.
Enthalpy
- B.
Internal energy
- C.
Heat
- D.
State function
- 5.A balloon filled with oxygen is placed in a freezer. Identify the system.
- A.
Balloon
- B.
Oxygen
- C.
Freezer
- D.
All of these
- 6.A bomb calorimeter is used in -----------------calorimetry?
- A.
Constant volume
- B.
Constant pressure
- C.
Both a and b
- D.
Constant temperature
- 7.Born Haber cycle is used to determine lattice energies of:
- A.
Molecular solids
- B.
Ionic solids
- C.
Covalent solids
- D.
Metallic solids
- 8.Q = ∆H when
- A.
∆V = 0
- B.
P = 0
- C.
∆E = 0
- D.
None of these
- 9.
Enthalpy of combustion for C is -393.5 kJ mole-1, Enthalpy of formation of CO2 would be- A.
+393.5 kJmole
- B.
-393.5 kJ
- C.
Zero
- D.
Can not be predicted from the given equation
- 10.Which of the following is not a state function of a system?
- A.
Thermal energy at constant pressure
- B.
Enthalpy
- C.
Internal energy
- D.
Work done
- 11.For writing thermochemical equation for enthalpy of combustion of an element requires a. 1 mole of element as reactant b. 1 mole of oxide of an element as product c. Standard at of the all the substances d. Balanced equation of 1 mole of element
- A.
A
- B.
A, b
- C.
A, c, d
- D.
A, b, c, d
- 12.Heat of------------of a substance is always negative.
- A.
Formation
- B.
Combustion
- C.
Decomposition
- D.
Solution
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