Use the data in the table above to calculate an approximate δh∘ in kilojoules for the synthesis of hydrazine from ammonia:
2nh3(g)+cl2(g)⟶n2h4(g)+2hcl(g)
express your answer to two significant figures and include the appropriate units.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance