25 mg chemical y (log kow = 2.88) is added to a microcosm
(i. e., tank) that contains 1 kg soil, 20 l water. chemical y has
negligible volatility (very low partitioning to air). the soil is
mized with water for several days until equilibrium (between the
chemical concentration on the soil and in the water) is
reached.
if the soil contains 2% organic carbon and it can be assumed
that koc=0.5*kow
what is the concentration of the chemical in the water (mg/l),
and in the soil (mg/kg)?

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.