Chemistry, 14.04.2020 17:23 amoakoh800003
Glauber's salt, sodium sulfate decahydrate (Na2SO4 · 10H2O) undergoes a phase transition (that is, melting or freezing) at a convenient temperature of about 32°C: Na2SO4 · 10H2O(s) → Na2SO4 · 10H2O(l)ΔH o = 74.4 kJ/mol As a result, this compound is used to regulate the temperature in homes. It is placed in plastic bags in the ceiling of a room. During the day, the endothermic melting process absorbs heat from the surroundings, cooling the room. At night, it gives off heat as it freezes. Calculate the mass of Glauber's salt in kilograms needed to lower the temperature of air in a room by 8.2°C at 1.0 atm. The dimensions of the room are 2.8 m × 10.6 m × 17.0 m, the specific heat of air is 1.2 J/g °C, and the molar mass of air may be taken as 29.0 g/mol.
Answers: 2
Chemistry, 22.06.2019 06:30
What effect might melting sea ice have for people who live in coastal areas?
Answers: 1
Chemistry, 22.06.2019 20:40
What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.
Answers: 1
Chemistry, 22.06.2019 23:50
Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules
Answers: 1
Glauber's salt, sodium sulfate decahydrate (Na2SO4 · 10H2O) undergoes a phase transition (that is, m...
Mathematics, 17.12.2019 23:31
English, 17.12.2019 23:31
Social Studies, 17.12.2019 23:31
Mathematics, 17.12.2019 23:31
Mathematics, 17.12.2019 23:31