MHT CET202525 Apr 2025Morning ShiftChemistryThermodynamics (C)Actual
Which from following transformations is endothermic in nature?
Options
- AH ₂ O _ ( ) H ₂ O _ (s)
- BH ₂ O _ ( s ) H ₂ O _ ( )
- CH ₂ O _ ( g ) H ₂ O _ ( )
- DH ₂ O _ ( g ) H ₂ O _ ( s )
Correct answer
B. H ₂ O _ ( s ) H ₂ O _ ( )
Step-by-step solution
Endothermic processes absorb energy, indicated by positive enthalpy change ( H > 0 ), while exothermic processes release energy ( H Freezing ( H ₂ O _ ( ) H ₂ O _ (s) ) releases energy as molecules form ordered structures. Melting ( H ₂ O _ ( s ) H ₂ O _ ( ) ) requires energy absorption to overcome intermolecular forces. Condensation ( H ₂ O _ ( g ) H ₂ O _ ( ) ) and deposition ( H ₂ O _ ( g ) H ₂ O _ ( s ) ) both release energy during phase transition to more condensed states. Only melting exhibits endothermic beh