Dilithium is crucial to the propulsion system of some starships. Dilithium is fomred by the adhesion
Channel: Doubtnut
Date: 2020-04-12

Dilithium is crucial to the propulsion system of some starships. Dilithium is fomred by the adhesion  of two lithium atoms in the gas phase:   `Li(g)+Li(g)toLi_(2)(g)`   The enthalpy of formation of dilithium is not easily measurable by direct means. However, th following thermochemicalparameters are known.   `DeltaH_(f)^(@)` of `Li_(g)=150kJ//mol`   IE of `Li_(g)=5eV//"atom"[1eV//"atom"=100kJ//mol]`   `BE` of `Li_((g))^(+)=130kJ//mol`   `IE` of `Li_(2(g))=5eV//"molecule"`   `[IE=` ionisation energy] `[BE=` bond energy]   Q. What is bond energy of `Li_(2(g))`?