Education platform for interview prep, online tests, tutorials, and live practice

Build skills with focused learning paths, mock tests, and interview-ready content.

WithoutBook brings subject-wise interview questions, online practice tests, tutorials, and comparison guides into one responsive learning workspace.

Search the library

Prepare Interview

Chemistry Interview Questions and Answers

← Previous
Next →

Question: Define enthalpy and its relationship with heat in chemical reactions.

Answer: Enthalpy is the heat content of a system at constant pressure. In chemical reactions, the change in enthalpy (Î”H) represents the heat exchanged with the surroundings.

Example:

Burning a piece of wood releases heat (exothermic), resulting in a negative Î”H.

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library

Is it helpful? Yes No

Most helpful rated by users:

What is the difference between an atom and a molecule?
Define pH and its significance in chemistry.
What is the difference between an element and a compound?
What is the purpose of a catalyst in a chemical reaction?
What is the significance of the periodic table in chemistry?