సీసం యొక్క విశిష్టోష్ణ సామర్థ్యం 125 Jkg-1 K-1 . 5 kJ ఉష్ణాన్ని  గ్రహించినప్పుడు 250 గ్రా సీసం ముక్క యొక్క ఉష్ణోగ్రత 10°C పెరిగితే, దాని ఉష్ణ సామర్థ్యాన్ని కనుగొనండి.?

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RRB ALP Fitter 21 Jan 2019 Official Paper (Shift 2)
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  1. 250 Jkg -1 K -1
  2. 200 J K -1
  3. 325 Jkg -1 K -1
  4. 500 J K -1

Answer (Detailed Solution Below)

Option 4 : 500 J K -1
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భావన :

ఉష్ణ సామర్థ్యం:

  • ఇచ్చిన పదార్థం యొక్క ఉష్ణోగ్రతను 1oC కు పెంచడానికి అవసరమైన ఉష్ణ శక్తి పరిమాణంగా ఇది నిర్వచించబడింది.
  • దీని ప్రమాణం JK- 1 .

ఇచ్చిన:

సీసం యొక్క విశిష్టోష్ణ ఉష్ణ సామర్థ్యం (CL) = 125 Jkg -1 K -1

Δ T= 10 o C, Q = 5 kJ

ఇప్పుడు, \(Q=mc Δ T \)

ఇక్కడ, \((mc)\) = ఉష్ణ సామర్థ్యం (JK -1)

\(mc = \frac{Q}{Δ T}=\frac{5\times 1000}{10}\) = 500 JK -1 .

కాబట్టి, ఎంపిక (4) సరైన సమాధానం.

గమనిక: ఈ ప్రశ్నలో, విశిష్టోష్ణ ఉష్ణ సామర్థ్యం మరియు సీసం ద్రవ్యరాశి ఇవ్వబడింది. కానీ ఉష్ణోగ్రత పెరుగుదల తర్వాత లెక్కించేందుకు సీసం యొక్క ఉష్ణ సామర్థ్యం అవసరం.

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