Q1: With increase in pressure, the saturation temperature of steam

ANS:A - increases rapidly first and then slowly.

With an increase in pressure, the saturation temperature of steam increases rapidly first and then slowly. Explanation:

• As pressure increases, the saturation temperature of steam increases due to the increased energy required to maintain the water in its vapor phase at higher pressures.
• Initially, at lower pressures, the increase in saturation temperature with pressure is rapid. This is because the additional energy required to overcome the intermolecular forces between water molecules and achieve vaporization is relatively low compared to higher pressures.
• As pressure continues to increase, the rate of increase in saturation temperature slows down. This is because the water molecules are already under higher pressure, so more energy is needed to achieve further vaporization.
• Eventually, at very high pressures, the increase in saturation temperature with pressure becomes much slower, reaching a plateau where the increase in temperature is minimal for each additional unit of pressure.