8. According to the text, how do insect-eating bats in the U. S. save farmers money?

because they help chase the insects that eat the crops away so the farmer can make a profit

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.

it is thermal conduction according to apex : )