The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na + will be The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na + will be November 11, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related