What is the standard enthalpy of formation of hydrogen bromide?

Answer 1

[from wikipedia] The standard enthalpy of formation"standard heat of formation" of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 bar of pressure and the specified temperature, usually 298.15 K or 25 degrees Celsius). Its symbol is ΔHfO.

Answer 2

The amount of energy required to create one mole of a substance from its constituent parts at standard temperature and pressure.

Answer 3

ΔHf = -83.7 kJmol-1 (kiloJoules per mole).

Answer 4

The heat of formation (enthalpy) for H2O is -285,8 kJ/mol at 25 oC.

Answer 5

-276.5 kJ/mol

Answer 6

2C(s)+H2(g)--->C2H2(g)

Answer 7

approx +52 KJ/mol

Answer 8

zero

Answer 9

-36 kj/mol