fisica video (llamas, topete 2011)
TRANSCRIPT
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CENTRO DE BACHILLERATO TECNOLÓGICO INDUSTRIAL Y DE SERVICIOS NO. 140
Física II
INTEGRANTES:Llamas Martínez Johana.
Romero Cortes Alicia.Topete Rojas Sadan.
5to AMA
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Experimento de Calor
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QUE HACER?
Nosotros vamos a colocar una botella de alcohol etílico de 450ml con un termómetro dentro, bajo el sol durante una hora.
Cada 15 minutos estaremos midiendo la temperatura para saber cuanto aumentado cada cierto tiempo.
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¿CUANTA ENERGÍA CALORÍFICA
RECIBIRÁ DEL SOL UNA BOTELLA
DE ALCOHOL ETÍLICO DE 450 ML,
DURANTE 1 HORA?
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HIPOTESISLa energía calorífica del sol que va a recibir la botella de alcohol etílico de 450ml será aproximadamente mas de 100 cal.
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TABLA DE RESULTADOS
Temperatura Hora
29 °C 00:00
32 °C 00:15
34 °C 00:30
36 °C 00:45
37 °C 01:00
Alcohol Etílico
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FORMULAS Y DESPEJES
Formula del calor especifico
Ce = Q m ( Tf – Ti )
DespejeQ = (Ce)(m)(Tf – Ti)
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Formula de densidadd = m v
Despeje
m = (d)(v)
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DATOS Ce = 0.59 cal
g °C
V = 435 mlD = 0.789 g
mlᶟQ = ?
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SUSTITUCIONES
m = (d)(v) m = (0.789 g )(435 ml)
mlᶟ m = 343.215 g
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Q = (Ce) (m) (Tf – Ti)Q = (0.59 cal ) (343.45g ) (37 °C – 29 °C)
g °CQ = (0.59 cal ) (343.45g ) (8 °C)
g °C
Q = 1619.974 cal.
RESULTADO !!!
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GRACIAS!!!