Calculate δ h ∘ in kilojoules for the reaction of ammonia (δ h ∘ f =−46.1 kj/mol) with o 2 to yield nitric oxide no (δ h ∘ f =91.3 kj/mol) and h 2 o(g) (δ h ∘ f =−241.8 kj/mol) , a step in the ostwald process for the commercial production of nitric acid.

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.

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