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40 ഡിഗ്രി സെൽഷ്യസ് താപനില ഉയർത്താൻ 100 ഗ്രാം വെള്ളി ബ്ലോക്കിലേക്ക് എത്ര ചൂട് നൽകണം? (വെള്ളിയുടെ പ്രത്യേക ചൂട് 236 Jkg-1K-1 ആണ്)

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  1. 450 J
  2. 1270 J
  3. 944 J
  4. 1988 J

Answer (Detailed Solution Below)

Option 3 : 944 J
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ആശയം:

പ്രത്യേക താപ ശേഷി:

  • അതിന്റെ താപനില ഒരു ഡിഗ്രി കൊണ്ട് മാറ്റാൻ ആവശ്യമായ താപത്തിന്റെ അളവ് എന്ന് നിർവചിക്കാം.
  • ഗണിതശാസ്ത്രപരമായി, ആവശ്യമായ താപം , Q = mcΔT,
  • ഇവിടെ m = പിണ്ഡം, c = നിർദ്ദിഷ്ട താപ ശേഷി, ΔT = താപനില വ്യത്യാസം
  • ജൂൾ (J) ൽ ചൂട് അളക്കാം.

കണക്കുകൂട്ടൽ:

നൽകിയിരിക്കുന്നത്: മാസ്, m = 100 g = g 0.1 kg, താപ വ്യത്യാസം, ΔT = 40ºC, വെള്ളിയുടെ നിർദ്ദിഷ്ട താപം, c = 236 J/ kg K

ആവശ്യമായ താപം, Q = mcΔT  

Q = 0.1 × 236 × 40

Q = 944 J

അതിനാൽ, ഒരു നിശ്ചിത താപനില ഉയരാൻ ആവശ്യമായ ഊർജ്ജം 944 J ആണ്.

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