Answer:
All the above are true.
Explanation:
State functions are properties whose values do not depend on the specific path/steps taken to obtain their values. Thus, the first statement is true.
The value of ΔErxn can be estimated using the constant volume calorimetry. This statement is also true.
Energy can neither be created nor destroyed but can be converted from one form to another (law of conservation of energy). This statement is also true.
The value of ΔHrxn can also be estimated using the constant pressure calorimetry. This statement is also true.
Therefore, all the statements are true. All the above are true.
