Calculate the standard enthalpy change for the reaction at 25 ∘ c. standard enthalpy of formation values can be found in this list of thermodynamic properties. c3h8(g)+ 5o2(g) ⟶ 3co2(g)+ 4h2o(g)

The standard enthalpy change for the reaction at is -2043.999kJ

Explanation:

Standard enthalpy change () for the given reaction is expressed as:

Where refers standard enthalpy of formation

Plug in all the given values from literature in the above equation:

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6