BRONSTED ACIDS AND BASES IN ORGANIC CHEMISTRY. 1  You should know that Bronsted-Lowry acids are proton donors, and Bronsted bases are proton acceptors. 2  You should be able to write simple Bronsted acid/base equations using curved arrows to show electron flow.
Calculate the amount of heat energy required to condense steam at 100 C,cool liquid and freeze it at 0 C. Share this answer and help others! When 1g of steam at 100 ÂºC condenses to give 1 g of water at 100 ÂºC, 2260 J of heat will be released to the surroundings. So find the heat released when 95g of steam changes. Specific heat of water = 4.18 J/gÂ° C. So multiply 4.18 by 95 (for mass of water) and by 100 (for temp change) Heat of fusion of water = 334.0 J/g (check this data). You have 95g so multiply it by 95. Add the three steps together to get total energy released.
It's used to turn the water into steam (the technical term for that energy is the latent heat of vaporization), and the steam stores that energy. It's a lot of energy: 1 gram of steam has enough energy to raise 7 grams of water from room temperature to boiling. When steam condenses back into water on the cooler surface of food, it gives that energy back, quickly heating the food surface. This is why steam can burn your skin badly and quickly. On the other hand, steam isn't very dense--in fact, it's over 1,600 times less dense than water--and, as soon as the surface of the food reaches the same temperature as the steam, you no longer get the huge benefit from condensation.