Question: First calculate the heat that needs to be removed to
First calculate the heat that needs to be removed to convert 1.0 kg of steam at 100oC to water at 140oC and then compute the heat that needs to be removed to lower the temperature of water at 100oC to water at 40oC. Compare the two results. Are you surprised?
Answer to relevant QuestionsHow much heat is required to completely boil away 0.50 L of liquid nitrogen at - 196oC? (Take the density of liquid nitrogen to be 0.80 x 103 kg/m3.) Ice (initially at 0 oC) is added to 0.75 L of tea at 20oC to make the coldest possible iced tea. If enough ice is added so the final mixture is all liquid, how much liquid is in the pitcher when this condition occurs? In an experiment, a 0.150-kg piece of a ceramic material at 20oC is placed in liquid nitrogen at its boiling point to cool in a perfectly insulated flask, which allows the gaseous N2 to immediately escape. How many liters of ...A student ate a Thanksgiving dinner that totaled 2800 Cal. He wants to use up all that energy by lifting a 20-kg mass a distance of 1.0 m. Assume that he lifts the mass with constant velocity and no work is required in ...Solar heating takes advantage of solar collectors such as the type shown in Fig. 11.22. During daylight hours, the average intensity of solar radiation at the top of the atmosphere is about 1400 W/m2. About of this radiation ...
Post your question