Answer:
ΔE (of water)= -37,56 KJ
Explanation:
Using the first law of thermodynamics:
ΔE= Q - W = ΔH - P(Vf - Vi)
- The heat released by water in its condensation diminishes its internal energy --> Negative contribution
- The work done to compress the water should increase its internal energy --> positive contribution (Vf< Vi) , Vf= mf/Df
W= P(Vf - Vi) = 1 atm * (101325 Pa/atm) * [ 1/(0,996gr/cm3)* 18 gr/mole*1 mole - 30,6 L * 1m3/1000L]] * 1 KJ/1000J = -3,01 KJ
ΔE= Q - W = (-40,66 KJ/mole)*1 mole - (-3,01 KJ) = -40,66 KJ + 3,01 KJ = (-37,56 KJ)
Answer:
5.42 mL needed to be added and 1.04 M of dilute solution
Explanation:
For both cases, you need to use the expression:
M1*V1 = M2*V2
where M and V are concentration and volume.
For the 1st question, we have both concentrations, but we do not have both volume so:
3 * V1 = 0.325 * 50
V1 = 0.325 * 50 / 3
V1 = 5.42 mL need to be added.
For question 2:
Same as above, with the difference that we need to calculate concentration so:
12 * 4.35 = M2 * 50
M2 = 12 * 4.35 / 50
M2 = 1.04 M is the concentration of the diluted solution
Answer:
One of the main components of an airbag is the gas that fills it. As part of the design process, you need to determine the exact amount of nitrogen that should be produced. Calculate the number of moles of nitrogen required to fill the airbag. Show your work. Assume that the nitrogen produced by the chemical reaction is at a temperature of 495°C and that nitrogen gas behaves like an ideal gas. Use this fact sheet to review the ideal gas law.