The sun is a main sequence star. during the last stage of its life cycle, it will become a white dwarf. it will shrink in size, but it will be very hot. which of the stars in your chart do you think is a white dwarf and why?

The ones with an absolute magnitude that is more than 5 and have a surface temperature between 25,000 and 7,500.

Barnard's star and  Proxima Centauri because their absolute magnitude is more than 5 and they have a surface temperature of 25,000 7,500.

Explanation: For edmentum users

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.