A coffee cup calorimeter contains 100.0mL of 1.50 M Ba(NO3)2 at 25.0 degrees Celsius. A student pours 100.0mL of 1.50 M Na2SO4 at 25 degrees Celsius into the calorimeter. A precipitate forms and the temperature rises to 29.7 degrees Celsius. Assume that no heat was lost to the surroundings, the volumes were additive, the specific heat capacity of the solution was 4.184 j/gal and the density of the solution was 1.00 g/mL. A) this reaction could be represented as a complete ionic or a net ionic equation. Write the balanced chemical equation that should be used in association with the value for this reaction.
B) find the amount of the heat that was last or gained by the solution in the calorimeter.
C) find the heat of reaction
D) is the reaction endothermic or exothermic?

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

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.