You are given the following data: 2H (g) H₂(g) 2Br(g) → Br₂ (g) 2HBr(g) → H₂(g) + Br₂ (g) kJ mol x10 > ΔΗ° = -436.4 Calculate AH° for the reaction H(g) + Br(g) → HBr (g) Be sure your answer has the correct number of significant digits. 2 ΔΗ° = -192.5 ΔΗ° = 72.4 kJ mol kJ mol kJ mol

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.