Hey oyewopomohammed, good to see you again. Question One a) (i): Enthalpy change between $300 \,^{\circ}\text{C}$ and $700 \,^{\circ}\text{C}$ for $3 \, \text{kg}$ of steam. Step 1: Calculate the specific enthalpy change ($\Delta h$) using the given $C_p$ equation. The specific heat capacity is given by: $$C_p = 2.07 + \frac{T - 400}{1400} \, \frac{\text{kJ}}{\text{kg} \,^{\circ}\text{C}}$$ The specific enthalpy change is calculated by integrating $C_p$ with respect to temperature: