Energy changes - Jamb Chemistry Past Questions and Answers

Question 76:

• JAMB 2015

When sugar is dissolve in ten, the reaction is accomplished by

A. Positive change
B. Negative entropy change
C. No entropy change
D. A minimum entropy change

Question 77:

• JAMB 2015

NH_3(g) + HCl_(s) → NH ₄Cl _(s)
The entropy change in the system above is

A. Positive
B. Zero
C. Negative
D. Intermediate

Question 78:

• JAMB 2015

N₂O_4(g)→ 2NO_2(g)
In the endothermic reaction above, more products formed will be favored by

A. A constant values
B. An increase in pressure
C. A decrease pressure
D. A decrease volume

Question 79:

• JAMB 2016

A chemical reaction in which the hydration energy is greater than the lattice energy is referred to as

A. A reversible reaction
B. A spontenous reaction
C. An endothermic reaction
D. An exothermic reaction

Question 80:

• JAMB 2016

In the diagram above, X is the

A. Enthalphy
B. Activated complex
C. Activation energy
D. Enthalphy change