NEETChemistryThermodynamics (C)
Given below are two statements: Statement I : The entropy decreases when the temperature of a crystalline solid is raised from 0 K to 115 K . Statement II: On raising temperature 0 K to 115 K the constituted particles begin to move therefore entropy increases. In the light of the above statements, choose the most appropriate answer from the options given below :
Options
- ABoth statement I and statement II are incorrect.
- BStatement I is correct but statement II is incorrect
- CStatement I is incorrect but statement II is correct.
- DBoth statements I and statements II are correct.
Correct answer
C. Statement I is incorrect but statement II is correct.
Step-by-step solution
- Statement I: The entropy does not decrease when the temperature of a crystalline solid is raised from 0 K to 115 K. In fact, as the temperature increases, the particles gain energy and begin to move more freely, leading to an increase in entropy. Therefore, this statement is incorrect. - Statement II: As the temperature increases from 0 K to 115 K, the constituent particles of the solid begin to vibrate more and gain kinetic energy, which results in an increase in entropy. This statement is correct.