How many kcal of heat are required to vaporize 25.0 kg of water at 100 degrees C? What mass of steam at 100 degree C must be added to 1.90kg of ice at 0 degree C to yield liquid water at 20 degree C? The heat of fusion for water is 333 kJ/k...
If the heat of vaporization of water is 539.5 calories per gram, how many calories of heat are needed to vaporize 2.46 kilograms of water? What is the average evaporation rate of water? How many calories are required to increase the temperature of 50 grams of water by 1 °C? A) 50 cal...
Evaporative cooling, or swamp cooling, takes advantage of the drop in temperature that occurs when water is exposed to moving air and begins to vaporize and change to a gas. A fan draws warm data center air through a water- or coolant-moistened pad, and as the liquid evaporates, t...
Here the potential energy - PE = mhg - mass times height (above the unfortunate foot) times acceleration due to gravity. Where does it come from? The energy required to raise it up. The kinetic energy is half m v squared when it hits your foot. This is converted into bone damage, o...
First, by looking at the net positive suction head required (NPSHr) curve of the pump. This is a calculation of how much absolute pressure is needed at the inlet to keep the system from cavitating. Second, calculate the NPSH available (NPSHa). This value represents the absolute...
After observing backpackers struggle for years with compass orientation, I am absolutely astonished that dogs can not only calculate declination, but can actually detect small changes in it. Let’s see, for 17 degrees westing, do I subtract or add that to the heading? It’s gotta be add, ...
After observing backpackers struggle for years with compass orientation, I am absolutely astonished that dogs can not only calculate declination, but can actually detect small changes in it. Let’s see, for 17 degrees westing, do I subtract or add that to the heading? It’s gotta be add, ...
How many joules of energy are required to raise the temperature of 50 grams of water from -100 degree C to 120 degree C? Calculate the energy needed to bring a cup of water (about 250 g) from 10 C to the boiling point. Then...
The normal boiling point of liquid ethanol is 351 K. Assuming that its molar heat of vaporization is constant at 37.5 kJ/mol, what is the boiling point of C_2H_5OH when the external pressure is 1.24 a Calculate the amount of heat required ...
How much heat is added to the system? 1 kg block of ice at 0-degrees Celsius placed in cooler. How much heat will the ice remove as it melts to water at 0-degree Celsius? How much heat is required to vaporize 7 grams of ice initially at 0 ...