The enthalpies of elements in their standard states are taken as zero. The enthalpy of formation of a compound

Question

The enthalpies of elements in their standard states are taken as zero. The enthalpy of formation of a compound (A) is always negative (B) is always positive (C) may be positive or negative (D) is never negative

Tardigrade Admin · Accepted Answer

The enthalpy of formation of a compound may be positive or negative as it can be exothermic or endothermic process.

Q. The enthalpies of elements in their standard states are taken as zero. The enthalpy of formation of a compound

is always negative

is always positive

may be positive or negative

is never negative

The enthalpy of formation of a compound may be positive or negative as it can be exothermic or endothermic process.