Why does ice float after it crystallizes? its mass is greater than water. its density is greater than water. its density is less than water. air trapped in ice causes it to float.

c (diamond),

sio2 (quartz)

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.