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దాని ఉష్ణోగ్రతను 40 °C పెంచడానికి 100 గ్రా వెండి బ్లాక్కి ఎంత వేడిని బదిలీ చేయాలి? (వెండి యొక్క నిర్దిష్ట వేడి 236 Jkg-1K-1)

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RRB ALP Electrician 22 Jan 2019 Official Paper (Shift 3)
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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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భావన:

నిర్దిష్ట ఉష్ణ సామర్థ్యం:

♦దాని ఉష్ణోగ్రతను ఒక డిగ్రీ ద్వారా మార్చడానికి అవసరమైన వేడి మొత్తంగా దీనిని నిర్వచించవచ్చు.
♦గణితశాస్త్రపరంగా, వేడి అవసరం, Q = mcΔT,
♦ఇక్కడ m = ద్రవ్యరాశి, c = నిర్దిష్ట ఉష్ణ సామర్థ్యం, ​​ΔT = ఉష్ణోగ్రత వ్యత్యాసం
♦వేడిని జూల్ (J)లో కొలవవచ్చు.
లెక్కింపు:

ఇవ్వబడింది: ద్రవ్యరాశి, m = 100 g = g 0.1 kg, ఉష్ణోగ్రత వ్యత్యాసం, ΔT = 40ºC, వెండి యొక్క నిర్దిష్ట వేడి, c = 236 J/ kg K

అవసరమైన వేడి, Q = mcΔT

Q = 0.1 × 236 × 40

Q = 944 J

అందువల్ల, నిర్దిష్ట ఉష్ణోగ్రత పెరగడానికి అవసరమైన శక్తి 944 J.

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