Using bromobenzene and ethylene oxide as your only sources of carbon, show how you could prepare trans-2,3-diphenyloxirane (a racemic mixture of enantiomers). One possible synthetic route involves an epoxide intermediate:

im pretty sure its b

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.