Which of the following statements is/are CORRECT?
1)If a reaction occurs at constant pressure,q = $\Delta$H.
2)The change in energy for a system is defined as the sum of the energies transferred as heat and work (i.e.,$\Delta$U = q + w).
3)If a reaction occurs at constant volume,q = w

Question

Quizplus · Accepted Answer

1) This statement is the Enthalpy equation (ΔH = q + PΔV), which is valid for reactions occurring at constant pressure. Therefore, it is correct.

2) This statement is the definition of Internal Energy (U) equation, which shows that the change in energy of the system is equal to the sum of heat (q) and work (w) exchanged with the surroundings. Therefore, it is correct.

3) This statement is incorrect because q and w are not always equal. q represents heat exchange between the system and surroundings, while w represents work exchange. At constant volume, work (w) may or may not be equal to heat (q), depending on the type of process.

Which of the Following Statements Is/are CORRECT? 1)If a Reaction Δ\DeltaΔ

Which of the Following Statements Is/are CORRECT?
1)If a Reaction $\Delta$