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.dsy:it. : Powered by vBulletin version 2.3.1 .dsy:it. > Didattica > Corsi A - F > Fisica generale > Esercizi Thread Rating: 1 votes, 5.00 average.
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.grande:maestro.

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112) Vogliamo portare la T dell'acqua nella vasca da bagno da 35°C a 45°C. Se la vasca contiene 30kg di acqua e per scaldarla usiamo un remo da canoa in modo da muover l'acqua ad 1m/s esecitando una F=30N costante...
...quanto tempo impieghiamo? Si supponga che tutto il L vada nel riscaldamento dell'acqua.


[t=42000sec cioè poco più di 11h e mezza]

06-05-2009 14:46
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.grande:maestro.

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113) Verso 150 di acqua a 50,4°C in un calorimetro che conteneva 150g di acqua a 19,2°C. Se la Tf di equilibrio vale 33,8°C, che massa ha il calorimetro?



[m=20,5g]

06-05-2009 14:48
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L) Termodinamica II: Gas Perfetti e Trasformazioni

06-05-2009 14:49
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114) Quanto pesa 1 mole di anidride carbonica?


[P=0,43N]

06-05-2009 14:51
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115) Definire le condizioni standard di un gas.

06-05-2009 14:51
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116) Quanto vale il Volumedi 1 mole di gas perfetto in cond st?


[V=22,4l]

06-05-2009 14:52
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117) Un palloncino di ossigeno (O2 = 32 u.m.a) ha un volume di 10m^3 in condizioni standard.
Quanto vale la massa del gas ivi (ivi? uahuahuah, ma come scrivo?!?) contenuto?



[m=14,3Kg]

06-05-2009 14:53
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118) Uno pneumatico ha pressione calibrata pari a 200KPa (va sommata a quella atm) , dopo 100km ha T=40°C. Quanto vale p dopo 100km?


[p=333KPa]

06-05-2009 14:56
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119) Come si calcola la K di Boltzmann?

06-05-2009 14:56
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120) Quante molecole d'aria inalo mentre respiro 1l di aria?


[N=2,7*10^22molecole]

06-05-2009 14:57
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121) Se confino 7kg di azoto biatomico (28g/mol) in 0,4m^3, che pressione avrà?



[p=15atm circa]

06-05-2009 14:59
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122) In un recipienre c'è aria a 0°C e 3atm, se la scaldo fino a 120°C, quanto vale la sua nuova p?



[p=4,3atm]

06-05-2009 14:59
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123) Una mongolfiera ha un carico di mezza tonnellata e vola a 30km di altezza. Se è riempita com 400 metri cubi di Helium a 15°C, quanto vale il volume del pallone quando è alla sua max altezza, sapendo che a 30km T è circa di 50°C sottozero e la p è un centesimo di quella atmosferica?


[V2=3,1*10^4m^3]

06-05-2009 15:02
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124) Che volume occupa una quantità di 8g di metano gassoso in condiz standard?


[V=11,2l]

06-05-2009 15:03
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125) Porto un gas ideale da 1atm e 100°K a 5atm con una trasformazione isocora con V=1m^3, quanto vale la Tfinale?
Risolvere con due tecniche diverse.




[T2=500K]

06-05-2009 15:04
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