foreverisabel
18.02.2022 •
Chemistry
17. in which of the following reactions is entropy
increasing?
(A)
(B)
(C)
(D)
2SO2(g) + O2(g) → 2503(g)
CO(g) + H2O(g) → H2(g) + CO2(g)
H2(g) + Cl2(g) → 2HCl(g)
2NO2(g) → 2NO(g) + O2(g)
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Ответ:
El volumen del gas era 12.95 L
Explanation:
Se relaciona la presión y el volumen mediante la ley de Boyle, que dice:
“El volumen ocupado por una determinada masa gaseosa a temperatura constante, es inversamente proporcional a la presión”
La ley de Boyle se expresa matemáticamente como: P*V=k
Por otro lado, la Ley de Charles consiste en la relación que existe entre el volumen y la temperatura absoluta de una cierta cantidad de gas ideal, el cual se mantiene a una presión constante. Esta ley dice que cuando la cantidad de gas y de presión se mantienen constantes, el cociente que existe entre el volumen y la temperatura siempre tendrán el mismo valor:
Por último, la Ley de Gay Lussac dice que la temperatura absoluta y la presión son directamente proporcionales. Es decir, cuando se mantiene todo lo demás constante, mientras suba la temperatura de un gas subirá también su presión. Y mientras la temperatura del gas baje, lo mismo ocurrirá con la presión:
Combinado las mencionadas tres leyes se obtiene:
Cuando se desean estudiar dos diferentes estados, uno inicial y una final de un gas, se puede aplicar:
Recordando que la temperatura debe usarse en grados Kelvin, conoces los siguientes datos:
P1: 750 torrV1: 8.5 LT1: 20°C= 293°K (siendo 0°C=273°K)P2: 425 torrV2: ?T2: -20°C= 253 °KReemplazando:
Resolviendo:
V2= 12.95 L
El volumen del gas era 12.95 L