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Anestetic [448]
3 years ago
9

What type of energy conversion is taking place inside a flashlight when it is on?

Chemistry
2 answers:
Aliun [14]3 years ago
7 0

Answer:

electrical energy

When the flashlight is turned on, the chemical energy is first transformed into electrical energy and then into light energy. CHEMICAL bonds. It is released during a chemical reaction (change). by flowing electrons (negatively charged particles).

ivanzaharov [21]3 years ago
7 0

Answer:

Electrical Energy

Explanation:

When the flashlight is turned on, the chemical energy is first transformed into electrical energy and then into light energy. CHEMICAL bonds. It is released during a chemical reaction (change). by flowing electrons (negatively charged particles).

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Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapor mixture at a pressure
Firdavs [7]

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_{R-134a}) = Q/T_{1}

Q = 180 kJ

T_{1} = -15.64 + 273.15 = 257.51 K

ΔS_{R-134a} = Q/T_{1} = 180/257.51 = 0.699 kJ/K

(b) The entropy change (ΔS_{c}) of the cooled space (ΔS_{c}) = -Q/T_{2}

Q = -180 kJ

T_{2} = -5 + 273.15 = 268.15 K

ΔS_{c} = Q/T_{2} = -180/268.15 = -0.671 kJ/K

(c) The total entropy change for this process (ΔS_{t}) = ΔS_{R-134a} + ΔS_{c} = 0.699 - 0.671 = 0.028 kJ/K

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What determines the amount of chemical energy something has
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