Thermodynamics Test

Result

Thermodynamics Test - 30

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Weekly Quiz Competition

Question 1
4 / -1

The enthalpy of dissolution of BaCl₂(s) and BaCl₂. 2 H₂O (s) are -20.6 and 8.8 kJ mol^-1 respectively. The enthalpy of hydration for BaCl₂(s) + 2 H₂O → BaCl₂.2H₂O (s) is

A
29.4 kJ

B
-29.4 kJ

C
-11.8 kJ

D
38.2 kJ

Solution
Question 2
4 / -1

The heats of combustion of rhombic and monoclinic Sulphur are respectively 70960 and 71030 calories. What will be the heat of conversion of rhombic Sulphur to monoclinic?

A
70960 calories

B
71030 calories

C
– 70 calories

D
+ 70 calories
Question 3
4 / -1

A
524.1

B
41.2

C
‒262.5

D
‒41.2

Solution
Question 4
4 / -1

The enthalpies of formation of N₂O and NO are 82 and 90 kJ/ mole respectively.The enthalpy of the reaction 2N₂O(g) + O₂(g) → 4NO(g) is equal to

A
8 kJ

B
88 kJ

C
-16 kJ

D
196 kJ

Solution
Question 5
4 / -1

Based on the following thermochemical equations

A
‒ 393 kJ

B
‒ 655 kJ

C
+393 kJ

D
+655 kJ
Question 6
4 / -1

The standard heat of formation in kcal/mole of NO₂ (g) and N₂O₄(g) are 8.0 and 2.0 respectively. The heat of dimerisation of NO₂ i.e. for 2 NO₂ (g) N₂O₄(g) in kcal is

A
10.0

B
– 6.0

C
– 12.0

D
– 14.0

Solution
Question 7
4 / -1

The enthalpy of vaporization of liquid water using the data

A
+43.93 kJ/mol

B
‒ 43.93 kJ/mol

C
+ 527.61 kJ/mol

D
‒ 527.61 kJ/mol
Question 8
4 / -1

The enthalpy changes at 298 K in successive breaking of O-H bonds of HOH are

A
498 kJ mol^-1

B
463 kJ mol^-1

C
428 kJ mol^-1

D
70 kJ mol^-1
Question 9
4 / -1

The bond energy of an O-H bond is 109 kcal mol^-1. When a mole of water is formed

A
218 kcal is released

B
109 kcal is released

C
218 kcal is absorbed

D
109 kcal is absorbed
Question 10
4 / -1

One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The ∆E for this process is (R = 2 cal mol^-1 K^-1)

A
163.7 cal

B
zero

C
1381.1 cal

D
9 lit atom