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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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Gun
.grande:maestro.

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arriva una pioggia di esercizi di termodinamica... sarete contenti spero..

Last edited by Gun on 06-05-2009 at 14:00

06-05-2009 13:56
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juggernaut
.amico.

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si sa qualcosa dei risultati?

06-05-2009 13:58
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Gun
.grande:maestro.

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disgraziato, mi tocca editare sopra per non fare caos :D

mmh.. sì, io qualcosa so.. ihih.

06-05-2009 13:59
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Gun
.grande:maestro.

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K) Termodinamica I : Calorimetria

06-05-2009 14:22
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Gun
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101) Sapendo che 1cal=4,186J, quanto calore serve per portare un recipiente vuoto di ferro di 20kg (CspecFe=450J/kg/K) da 10°C a 90°C?



[Q=720KJ]

Last edited by Gun on 06-05-2009 at 14:29

06-05-2009 14:23
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102) E se volessi riscaldare 20kg di acqua?


[Q=6,698MJ]

06-05-2009 14:29
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Gun
.grande:maestro.

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103) Verso 200cm^3 di the (come se fosse acqua) a 91°C in una tazza di vetro di 150g inizialmente a 25°C.
Quanto vale la T d'equilibrio della miscela? Si usi CspecVetro=840J/kgK


[Tf=86°C]

06-05-2009 14:32
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.grande:maestro.

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104) 50g di metallo a 200°C vengono gettati in un secchio d'acqua (0,4kg) inizialmente a 20°C.
Sapendo che la T d'equilibrio sarà Tf=22,4°C, di che metallo si tratta?
E quanto vale l'Energia ceduta all'acqua durante il raffreddamento del metallo?


[Ferro....perchè?; E=4,019KJ]

06-05-2009 14:34
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.grande:maestro.

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105) Una lega di metallo di 150g viene scaldata fino a 540°C, poi gettata in 400g di acqua a 10°C che si trova in un calorimetro di Alluminio di 200g (CspecAl=900J/KgK).
Sapendo che la Tf vale 30,5°C, quanto vale il Cspec della lega?



[CspecL=500J/KgK]

06-05-2009 14:36
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Gun
.grande:maestro.

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106) Un blocco di Cuprum (asd) di 2kg, a 60°C, viene immerso in una vasca contenente 5kg di acqua distillata a 10°C. Se Tf (equilibrio) vale 12°C, quanto vale il Cspec del Cu? Torna con quanto riportato nelle tabelle?



[CspecCu=436j/KgK; no, è 385]

Last edited by Gun on 16-06-2009 at 12:21

06-05-2009 14:38
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107) Se invece immergessi soltanto metà blocco di rame, che accadrebbe?



[Tf=11,77°C]

usate il valore delle tabelle del calore spec

Last edited by Gun on 16-06-2009 at 12:22

06-05-2009 14:39
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108) Dato che a me Dracula sta sul cazzo ed il paletto di frassino costa troppo con la crisi, sparo un proiettile d'argento a 200m/s contro un muro di legno per allenarmi.
Sapendo che CspecAg=234J/KgK, quando si raffredderà il proiettile nel legno?



[Si raffredda di 85,47°C]

06-05-2009 14:41
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109) Quante calorie servono per scaldare 3kg di Al (CspecAl=900J/KgK) di 30°K?


[Q=19,4Kcal]

06-05-2009 14:42
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110) Quanti J servono per scaldare 3,2 litri di acqua da 25°C a 99°C?




[Q=991KJ]

06-05-2009 14:43
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.grande:maestro.

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111) Mezzo kg di piombo a 700°C viene immerso in un secchio contenente 1 litro di acqua a 20°C. Se CspecPb vale circa 130J/KgK, quanto vale la Tf?


[Tf=323,5°K]

Last edited by Gun on 16-06-2009 at 12:27

06-05-2009 14:44
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