Explain why each are chemical or physical properties if I made a mistake pls tell me

Heat of combustion- the heat released when one mole of a substance is completely burned. In this case, one mole of oxygen reacts with one mole of methanol to form one mole of carbon dioxide and two moles of water. ... By measuring the temperature change, the heat of combustion can be determined.

Reactivity-  reactivity is the impetus for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy

Strength - The strength of an acid is a measure of the degree of ionization in an aqueous solution. The greater the number of ions dissociated, or the number of cations and anions released in solution, the stronger the acid

Solubility- Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent.

Viscosity-  describes the internal friction of a moving fluid. A fluidwith large viscosity resists motion because its molecular makeup gives it a lot of internal friction.

Explanation:

answer: i dont know the answer but this might

explanation:

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a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.