What Is The Stability Of ZnH2 Under Different Temperatures And Pressures?

Zinc hydride (ZnH2) is an unstable compound that rapidly decomposes into its constituent elements, zinc (Zn) and hydrogen (H2), even at low temperatures and pressures.

At room temperature and pressure, ZnH2 is highly unstable and will decompose spontaneously into Zn and H2. However, the rate of decomposition can be slowed down by storing it in an inert atmosphere or at low temperatures.

Under high temperatures and pressures, ZnH2 can undergo various reactions such as disproportionation, dehydrogenation, and reduction with other compounds. For example, at high temperatures (~ 450°C), ZnH2 can react with ZnO to form metallic zinc and water vapor.

In summary, ZnH2 is unstable under most conditions and readily decomposes into its constituent elements unless stored in an inert atmosphere or at very low temperatures. At high temperatures and pressures, ZnH2 can undergo various reactions leading to its decomposition or reaction with other compounds.