Question

For an endothermic reaction:
(A) $q_p$ is negative.
(B) $\Delta_rH$ is positive.
(C) $\Delta_rH$ is negative.
(D) $q_p$ is positive.
Choose the correct answer from the options given below:

• A. B and D
• B. C and D
• C. A and B
• D. A and C

Answer 1

Answer: (A)

B and D

Answer 2

For an endothermic reaction:
∆rH is positive: Endothermic reactions absorb heat from the surroundings, resulting in a positive change in enthalpy (∆H).
$q_p$ is positive: At constant pressure (denoted by the subscript p), the heat absorbed by the system ($q_p$) is equal to the change in enthalpy (∆H). Since ∆H is positive for an endothermic reaction, $q_p$ is also positive.
Therefore, the correct statements are B and D.