2073600 secondsssssssssssssssssssssssssss
Answer:
(a) 0.699 kJ/K
(b) -0.671 kJ/K
(c) 0.028 kJ/K
Explanation:
The Refrigerant-134a flows into the evaporator as a saturated liquid-vapor mixture and flows out as a saturated vapor at a saturation pressure of 160 kPa and temperature of -15.64°C (estimated from the Saturated Refrigerant-134a Temperature Table).
(a) The entropy change of the refrigerant (ΔS
) = Q/T
Q = 180 kJ
T = -15.64 + 273.15 = 257.51 K
ΔS = Q/T = 180/257.51 = 0.699 kJ/K
(b) The entropy change (ΔS
) of the cooled space (ΔS) = -Q/T
Q = -180 kJ
T = -5 + 273.15 = 268.15 K
ΔS = Q/T = -180/268.15 = -0.671 kJ/K
(c) The total entropy change for this process (ΔS
) = ΔS + ΔS = 0.699 - 0.671 = 0.028 kJ/K
Answer:
D For Doras Demolishing Dub Dune Is Dungenes
A scientist form a hypothesis because he wants to : (D). To provide a statement that can be tested with an experiment
<h3>Meaning of hypothesis</h3>
A hypothesis can be defined as a statement that is proposed by a scientist and needs to be tested by other scientist.
So in a simple statement, hypothesis in its raw state is an untested and unproven fact that is propagated by a scientist.
In conclusion, a scientist form a hypothesis because he wants to : To provide a statement that can be tested with an experiment
Learn more about hypothesis: brainly.com/question/11555274
#SPJ1
