Data Table 1 Record the amount of solute left after one minute of stirring. Beaker Amount of Solute at Start (g) Amount of Solute at End (g) Solution with Compound A 50 Solution with Compound B 50 Plain water in Beaker C 0 (control group) Data Table 2 Record the the boiling point for each solution. Beaker Temperature at Start (°C) Temperature at Boiling Point (°C) Solution with Compound A 23 Solution with Compound B 23 Plain water in Beaker C 23 Analysis and Conclusion Which compound dissolved more easily? Which compound had the lower boiling point? Are the answers to 1 and 2 the same compound? What does this tell you about the strength of the bonds in this compound? Which compound is the sugar? Which compound is the salt?

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?