Chemistry, 15.04.2020 02:11 sierravick123owr441

Enter your answer in the provided box. 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: 3

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 12:20

Consider the reaction of a(g) + b(g) + c(g) => d(g) for which the following data were obtained: experiment initial [a], mol/l initial [b], mol/l initial [c], mol/l initial rate, mol/l.s 1 0.0500 0.0500 0.0100 6.25 x 10^-3 2 0.100 0.0500 0.0100 2.50 x 10^-2 3 0.100 0.100 0.0100 1.00 x 10^-1 4 0.0500 0.0500 0.0200 6.25 x 10^-3 what is the rate law for the reaction?

Answers: 3

Answer

Chemistry, 22.06.2019 17:40

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Answers: 1

Answer

Chemistry, 22.06.2019 22:30

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.

Answers: 2

Answer

Chemistry, 22.06.2019 23:30

If maltose undergoes hydrolysis what subunits does it results to?

Answers: 2

Answer

You know the right answer?

Enter your answer in the provided box. Glauber's salt, sodium sulfate decahydrate (Na2SO4 · 10H2O) u...

Questions