A fruit juice is being heated in an indirect heat exchanger using steam as a heating medium. The product flows through the heat exchanger at a rate of 1500 kg/h and the inlet temperature is 20°C. Determine the quantity of steam required to heat the product to 100C when only latent heat of vaporization (2200 kJ/kg) is used for heating. The specific heat of the product is 4 kJ/(kg C).
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- The temperature of a aluminum bar rises by 10.0°C when it absorbs 4.73 kJ of energy by heat. The mass of the bar is 525 g. Determine the specific heat of aluminum from these data.How much thermal energy (in J) is required to boil 2.45 kg of water at 100.0°C into steam at 135.0°C? The latent heat of vaporization of water is 2.26 ✕ 106 J/kg and the specific heat of steam is 2010 J kg · °C . HINT JA 500 g copper cup has an initial temperature of 250 oK. If the specific heat of copper is 385 J kg-1 oK-1 and 2.5 x 104 J of heat are transferred into it, what is the final temperature of the cup in Kelvins?
- An unknown substance has a mass of 0.125 kg and an initial temperature of 90.0°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at 21.5°C. The mass of the aluminum container is 0.150 kg, and the temperature of the calorimeter increases to a final equilibrium temperature of 32.0°C. Assuming no thermal energy is transferred to the environment, calculate the specific heat of the unknown substance.You wish to cool a 1.95 kg block of brass initially at 80.0°C to a temperature of 41.0°C by placing it in a container of water initially at 20.0°C. Determine the volume (in L) of the liquid needed in order to accomplish this task without boiling. The density and specific heat of water are respectively 1,000 kg/m3 and 4,186 J/(kg · °C), and the specific heat of brass is 380 J/(kg · °C).An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 458-g sample of silver at an initial temperature of 90°C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32°C. Calculate the mass of the aluminum cup. g?