Explain how the particle nature of matter helps us understand why a sugar cube dissolves faster in hot water than in cold water.
BiologyClass 9CBSEAnswered 12 May 2026
Answer
When sugar is added to water, the water particles move into the spaces between the sugar particles, and the sugar particles move into the spaces between the water particles. In hot water, the particles have more kinetic energy, meaning they move faster. This increased movement leads to a more rapid intermixing of sugar and water particles, resulting in faster dissolution.
The kinetic energy of particles increases with temperature. Faster-moving particles collide more frequently and with greater force, leading to a quicker breakdown of the sugar crystal structure and a more efficient distribution of sugar particles throughout the water.
Suggested Q&A
Biology · Class 9- BiologyClass 9A boy runs along a circular track of radius 7 meters. If he completes one full round in 22 seconds, calculate his average speed and the magnitude of his average velocity for this round.
- BiologyClass 9What is the function of stomata in the epidermis of plant leaves?
- BiologyClass 9Describe the general characteristics of connective tissues that set them apart from other animal tissues.
- BiologyClass 9Distinguish between primary growth and secondary growth in plants, indicating which meristems are responsible for each.
- BiologyClass 9What is the role of intercalated discs in cardiac muscle tissue?
- BiologyClass 9Enlist the major types of cells found in blood and their specific functions.