How does binding energy per nucleon vary with mass number?

Binding energy is a measure of the stability of the nucleus. Binding energy first increases with mass number and then decreases. Binding energy for nuclei with low mass number is less and gradually increases with increase in mass number. It reaches to peak at around mass number of 50. Iron nucleus (FE 56) is having almost the maximum binding energy. After that(Mass number greater than 60), the binding energy per nucleon gradually decreases.

It’s the energy source of stars

Answer : option c) heat is released during the process.explanation :

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.