Question:
Enthalpy change is always negative for which one of the following processes?
Enthalpy change is always negative for which one of the following processes?
Updated On: Apr 4, 2025
- Enthalpy of ionisation
- Enthalpy of sublimation
- Enthalpy of vapourisation
Enthalpy of combustion
Enthalpy of fusion
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
The enthalpy of combustion is the heat change when one mole of a substance is completely burnt in excess oxygen under standard conditions.
This is an exothermic process, which means it releases heat to the surroundings.
Therefore, the enthalpy change (\( \Delta H \)) is always negative for combustion.
Correct Answer:
Enthalpy of combustion
Was this answer helpful?
0
0
Top Questions on Enthalpy change
- Given below are two statements:
Statement (I): The radius of isoelectronic species increases in the order: \[ \text{Mg}^{2+} < \text{Na}^{+} < \text{F}^{-} < \text{O}^{2-} \] Statement (II): The magnitude of electron gain enthalpy of halogens decreases in the order: \[ \text{Cl} > \text{F} > \text{Br} > \text{I} \] In light of the above statements, choose the most appropriate answer from the options given below:- JEE Main - 2025
- Chemistry
- Enthalpy change
- The incorrect relationship in the following pairs in relation to ionisation enthalpies is:
- JEE Main - 2025
- Chemistry
- Enthalpy change
- The group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 kJ mol$^{-1}$ respectively. The above values are lowest among their group members. The nature of their ions A$^{2+}$ and B$^{4+}$ respectively is:
- JEE Main - 2025
- Chemistry
- Enthalpy change
- The bond dissociation energies of gaseous H2, Cl2, and HCl are 104, 58, and 103 kcal, respectively. The enthalpy of formation of HCl gas would be:
- BCECE - 2025
- Chemistry
- Enthalpy change
- What is the enthalpy of neutralization for CH3COOH + NaOH?
- BCECE - 2025
- Chemistry
- Enthalpy change
View More Questions
Questions Asked in KEAM exam
- If $ f(x) = \log 3 - \sin x $, $ y = f(f(x)) $, find $ y(0) $.
- KEAM - 2025
- Functions
- The inward electric flux through a closed surface is \( 6 \times 10^{-5} \) and the outward flux is \( 3 \times 10^{-5} \). Then the total charge enclosed is?
- KEAM - 2025
- Electrostatics
- The element that has the highest melting point in the 3d series is:
- KEAM - 2025
- d -and f -Block Elements
- A planet revolves around the sun with a time period 27 times that of planet B. Planet A is at \( x \) times the distance of planet B from the sun. Find the value of \( x \).
- KEAM - 2025
- Astronomy
- Find the limit: \[ \lim_{x \to 0} \frac{\sin[x]}{[x]}, \text{ where } [x] \text{ represents greatest integer function} \]
- KEAM - 2025
- Continuity
View More Questions