Another hypothesis about the mass extinction 66 million years ago involves a supernova happening near earth. this could have produced enough iridium to explain the anomaly. however, the supernova would have also led to two other results that were unlikely. describe one of the possible results from the supernova hypothesis that was not supported by the fossil record or the iridium layer.

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.

може ли да зареждате повече информация, моля