C. CaCl2 is the correct answer
The change in enthalpy for the reaction of carbon dioxide is -393.5 kJ/mol. Thus, option A is correct.
The change in enthalpy of the reaction is given by the energy of the product and the energy of reactant difference.
The chemical equation for the reaction is:

<h3>Computation for the enthalpy change</h3>
The standard enthalpy change for carbon dioxide is -393.5 kJ/mol
The standard enthalpy change for oxygen is 0 kJ/mol
The change in enthalpy of reaction is given as:

The change in enthalpy for the reaction of carbon dioxide is -393.5 kJ/mol. Thus, option A is correct.
Learn more about change in enthalpy, here:
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3). 150°C and 100 kPa
Gases behave ideally at high temperatures and low pressures (less intermolecular forces)
Answer:
7.35 - 7.45
Explanation:
The pH scale ranges from 0 (strongly acidic) to 14 (strongly basic or alkaline). A pH of 7.0, in the middle of this scale, is neutral. Blood is normally slightly basic, with a normal pH range of about 7.35 to 7.45. Usually, the body maintains the pH of blood close to 7.40.
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