Which element would require the least energy to remove its outermost electron?

If a reaction has ΔH = –245 kJ, the reaction is:

The specific heat capacity of a substance is defined as the amount of heat required to:

Which electron configuration represents sodium (Z = 11)?

Which expression correctly calculates the enthalpy change of a reaction using standard enthalpies of formation?

What is the electron configuration of nitrogen (Z = 7)?

Ionization energy generally:

The carbon atom in methane (CH₄) is:

Thermochemistry is the study of:

At constant pressure, the heat exchanged during a reaction is equal to: