Refrigerant 134a enters a compressor running at steady state as saturated vapor at 2 bar with a volumetric flow rate of 1.9×10−2 m3/s1.9 \times 10^{-2} \mathrm{~m}^3 / \mathrm{s}1.9×10−2 m3/s. The refrigerant is compressed to a pressure of 8 bar in an internally reversible process according to pv1.03=p v^{1.03}=pv1.03= constant. Disregarding kinetic and potential energy effects, find
(a) the power needed, in kW\mathrm{kW}kW.
(b) the rate of heat transfer, in kW\mathrm{kW}kW.
You place a metal bar magnet on a swivel and bring a negatively charged plastic rod near the north pole and then near the south pole. What do you observe? (a) The north pole turns toward the rod. (b) The south pole turns toward the rod. (c) The poles do not interact with the rod. (d) Both poles are attracted to the rod.
Two different compounds have the formula XeF2Cl2.\mathrm{XeF}_{2} \mathrm{Cl}_{2}.XeF2Cl2. Write Lewis structures for these two compounds, and describe how measurement of dipole moments might be used to distinguish between them.
State a meaning of each word element, and give a medical term from this chapter that uses it or a slight variation of it.
iso-
