Helium is
most abundant element in the universe and forms__ in
like our sun.

a-1st; stars
b-2nd; stars
c-3rd ; stars
d-2nd ; planets

one state would change   like louisiana to texas. thats a change

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.