A500 ml glass of liquid n-pentane at 283 k is removed from a refrigerator that is located outside on a very hot day in phoenix. the n-pentane slowly equilibrates to the ambient temperature, which is 110 °f. the process occurs at 1 bar. calculate the entropy change of the n-pentane, δsn-c5, the entropy change of the surroundings, δssurr, and the entropy change of the universe, δsuniv. neglect the heat capacity of the container. the normal boiling point for n-pentane is 309.2 k, liquid density is 626 kg/m3 , and heat of vaporization can be taken as 25.79 kj/mol. assume constant cp values ca be used, with a liquid cp value of 169 j/mol-k, and a vapor cp value of 126 j/mol-k.

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

Express the following number in scientific notation. 0.026890 =

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.