Misalai 3 na tambayoyi kan dokar farko ta thermodynamics
1. Ana ƙara joules 3000 na zafi a cikin tsarin, kuma tsarin yana yin joules 2500 na aiki akan muhalli. Canjin makamashin ciki na tsarin shine…
Tattaunawa
An sani :
Zafi (Q) = +3000 Joules
Aiki (W) = +2500 Joules
An tambaya : canje-canje a cikin makamashin ciki
Jawab :
Dokar Farko ta Thermodynamics :
Dokokin Alamar :
Q yana da kyau idan aka ƙara zafi a cikin tsarin.
W yana da kyau idan tsarin yana aiki akan yanayin
Q yana nufin komfuri idan tsarin ya saki zafi
W yana nufin ko dai ko dai ko yanayin yana aiki akan tsarin
Canje-canje a cikin makamashi a cikin tsarin:
Ƙarfin da ke cikin tsarin yana ƙaruwa da Joules 500.
2. An ƙara Joules na zafi na 2000 a cikin tsarin kuma kewayen yana yin Joules 2500 na aiki akan tsarin. Canjin makamashin ciki na tsarin shine…
Tattaunawa
An sani :
Zafi (Q) = +2000 Joules
Aiki (W) = -2500 Joules
An tambaya : canje-canje a cikin makamashi a cikin tsarin
Jawab :
Ƙarfin da ke cikin tsarin yana ƙaruwa da Joules 4500.
3. Ana fitar da Joules na zafi na 2000 daga tsarin, kuma kewayen yana yin Joules 3000 na aiki akan tsarin. Canjin makamashin ciki na tsarin shine…
Tattaunawa
An sani :
Zafi (Q) = -2000 Joules
Aiki (W) = -3000 Joules
An tambaya : canje-canje a cikin makamashi a cikin tsarin
Jawab :
Ƙarfin da ke cikin tsarin yana ƙaruwa da Joules 1000.
Kammalawa:
– Idan tsarin ya sha zafi daga muhalli, makamashin da ke cikin tsarin yana ƙaruwa.
– Idan tsarin ya saki zafi ga muhalli, makamashin da ke cikin tsarin zai ragu.
– Idan tsarin ya yi aiki a kan muhalli, makamashin da ke cikin tsarin yana raguwa.
– Idan muhalli ya yi aiki a kan tsarin, makamashin da ke cikin tsarin yana ƙaruwa.
