Salt water steam pressure vs fresh water steam pressure - Physics …
2012年1月29日 · This means that salt water requires a higher temperature and pressure to turn into steam compared to fresh water. As a result, the steam pressure produced from salt water will be higher than that of fresh water. Is it possible to have higher steam pressure with salt water compared to fresh water? Yes, due to the higher boiling point of salt ...
How Much Heat To Turn Water To Steam? - Physics Forums
2007年7月1日 · The amount of heat needed to turn water to steam depends on the initial temperature and volume of the water, as well as the atmospheric pressure. However, on average, it takes about 2260 joules of energy to convert 1 gram of water at 100 degrees Celsius to steam at the same temperature.
Why is steam hotter than boiling water? - Physics Forums
2009年2月4日 · Compare the heat that is added to water (100 cal/g) to get it to 100 deg C, to the heat that is added (540 cal/g) to turn the water into steam at the same temperature. The steam is no hotter than the water but it contains more usable heat energy per gram, and it can release that heat as it encounters a cooler medium and makes the phase-change ...
Water / steam homogeneous mixture - Physics Forums
2018年6月3日 · A water/steam homogeneous mixture is a uniform combination of water and steam molecules. This means that both water and steam are evenly distributed throughout the mixture, resulting in a single phase system.
Rate of evaporation and steam tables - Physics Forums
2013年3月20日 · Looking at the steam table below, if I understand things correctly, it will take 419kJ to bring a kg of water to the boil at 100°C and a further 2257kJ to turn all of that boiling water into steam. I assume that would have to be in an open boiler, as the pressure inside of a closed vessel would increase, in turn increasing the boiling point of ...
Water, Ice, Steam Mixture - Final Temperature - Physics Forums
2011年11月14日 · The final temperature of a water, ice, and steam mixture depends on the proportions of each component and the initial temperatures of the water and steam. It can range from 0°C to 100°C, with the majority of mixtures averaging around 50-60°C. Can the final temperature of a water, ice, and steam mixture be below 0°C?
Steam at specific volume/pressure - Physics Forums
2011年11月10日 · For reference, with steam of pure water, the formula PV=nRT combined with a molar mass of water of 18 g/mol, yields that: At P=70 atm, V=1 m3, T=286.72 °C, you need 27 kg water which is approximately 27 liters of liquid water. If the steam is saturated in air, you need to consult the saturated steam table.
Finding the final temperature of a mixture of ice and steam
2021年2月14日 · Have you ever boiled water to make a cup of tea? You *require* (must supply) an amount of energy ##ml_v## to convert water to steam. But you do not need to supply any energy to condense the steam to water. In fact the steam *releases* an amount of energy ##ml_v## when it condenses. In words, the equation ##Q_1 + Q_2 = Q_3 + Q_4## means:
Energy Required to Change Water into Steam - Physics Forums
2011年7月20日 · In summary, water changes into steam through a process called evaporation, where water molecules absorb enough energy to break their bonds and escape as water vapor. The energy required for this process is known as the heat of vaporization, which varies depending on temperature and pressure but averages around 2260 kJ per kilogram of water.
Steam vs water at the same temperature - Physics Forums
2004年11月19日 · In summary, at standard atmospheric pressure, usually accepted as 14.7 psi, at 100 deg C. water boils and steam condenses simultaneously, 100 C is the max temperature water can reach at this pressure and it is the minimum temperature that steam can …
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