H2Se (hydrogen (I) selenide) Boiling point: -42°C H2S (hydrogen sulfide) Boiling point: -60°C H2Te (hydrogen telluride) Boiling point: -4 °C Solution H2Se (hydrogen (I) selenide) Boiling point: -42°C H2S (hydrogen sulfide) Boiling point: -60°C H2Te (hydrogen telluride) Boiling point: -4 °C.