7–86 A constant-volume tank contain

7–86 A constant-volume tank contains 5 kg of air at 100
kPa and 327°C. The air is cooled to the surroundings temperature
of 27°C. Assume constant specific heats at 300 K.
(a) Determine the entropy change of the air in the tank during
the process, in kJ/K, (b) determine the net entropy change
of the universe due to this process, in kJ/K, and (c) sketch the
processes for the air in the tank and the surroundings on a
single T-s diagram. Be sure to label the initial and final states
for both processes.

Hasil (Bahasa Indonesia) 1:

7 – 86 A konstan-volume tangki berisi 5 kg udara 100kPa dan 327° C. Udara didinginkan hingga temperatur lingkungan27° c. Menganggap konstan tertentu heats di 300 K.(a) menentukan perubahan entropi udara di dalam tangki selamaproses tersebut, dalam kJ/K, (b) menentukan perubahan bersih entropialam semesta karena proses ini, di kJ/K, dan (c) sketsaproses untuk udara di tangki dan sekitarnya padasatu diagram T-s. Pastikan untuk label Serikat awal dan akhiruntuk kedua proses.