Physics

Physics, 17.08.2019 20:10, shan8747

Consider the vaporization of liquid water to steam at a pressure of 1 atm. is this process endothermic or exothermic?

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Chemistry, 23.07.2019 14:00, alicat20

Anyone know any of these? pls , need to correct asap energy changes occur as * a.heat transfer b.work c.power d.a combination of heat transfer and work when heat energy is absorbed from surroundings * a.it is an exothermic process b.it is an endothermic process c.a chemical change must occur d.it feels warm to the touch 1 calorie is equal to (mark all that apply) * a.2 points b.1,000 kilocalories c.1 kilocalorie d.1,000 calories heat capacity depends on * a.pressure b.mass c.density d.joules 1 calorie is equal to * a.4.184 j b.1,000 j c.6.02x10²³ j d.8.314 j condensation is * a.a chemical exothermic process b.a physical exothermic process c.a chemical endothermic process d.a physical endothermic process what kind of thermochemical equation is represented below? * a.endothermic b.exothermic c.neutralization d.single replacement reaction when 435 j of heat is added to 3.4 g of olive oil at 21°c, the temperature increases to 85°c. what is the specific heat of olive oil? show your work for credit. * a.94,656 j/g°c b.2.0 j/g°c c.23 j/g°c d.1.5 j/g°c a positive δ h value indicates that the reaction is * a.endothermic b.exothermic c.neutral d.synthesis

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Physics, 20.08.2019 23:20, kingsavage2002

Saturated liquid water at 10.0 mpa is throttled through a partially open valve (isenthalpic process) and discharged into a tank at a pressure 0.1 mpa adiabatically, aergonically, and without any change in its kinetic or potential energy. (note: when the pressure on saturated liquid water is suddenly reduced in an adiabatic aergonic, steady flow process, part of the initial liquid is very quickly converted into a saturated vapor at the lower pressure, with the vaporization energy (heat of vaporization) coming from the remaining liquid. the resulting vapor is called flash steam because the liquid appears to “flash” into a vapor as it expands into the low pressure region). determine: the exit temperature of the flash steam the amount of flash steam produced (quality)

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Chemistry, 28.08.2019 23:00, juanmercs99

Which of the following concerning the effects of temperature and pressure on solubility is/are correct? 1. all gases become more soluble in a liquid at a fixed pressure when the temperature of the liquid is increased. 2. the dissolution of an ionic compound in water may be exothermic or endothermic, depending on the initial temperature of the solution. 3. the solubility of a liquid in water generally is significantly effected by pressure changes of the system.

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Chemistry, 18.09.2019 20:00, paolaviviana

Consider the phase change h2o(l)-> h2o(g) the equation describes the phase change from liquid water to steam. think about the heat flow that is necessary for this change to take place. what do you reduce about the process? it will be 1)exothermic 2) endothermic

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