2.5 किलो वजनाच्या एका स्टीलच्या भांड्याचे तापमान 10 अंशांनी वाढल्यास भांड्याची ऊष्मा क्षमता शोधा. स्टीलची विशिष्ट ऊष्मा क्षमता 500 Jkg-1K-1 आहे.

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RRB ALP Fitter 23 Jan 2019 Official Paper (Shift 2).
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  1. 200 Jkg-1K-1
  2. 1,250 JK-1
  3. 125 JK-1
  4. 20 Jkg-1K-1

Answer (Detailed Solution Below)

Option 2 : 1,250 JK-1
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संकल्पना:

मिळवलेली किंवा गमावलेली उष्मा ऊर्जा:

  • वस्तू मिळवलेली किंवा गमावलेली उष्मा ऊर्जा त्याचे वस्तुमान, स्वरूप आणि तापमानातील बदल यावर अवलंबून असते.
  • गणितीयदृष्ट्या, ते याद्वारे दर्शविले जाऊ शकते:

Q = m x c x ΔT

Q = मिळवलेली किंवा गमावलेली उष्मा, m = वस्तुमान, c = विशिष्ट उष्मा, ΔT = तापमानात बदल

उष्मा क्षमता:

  • उष्मा क्षमता किंवा औष्णिक क्षमता ही पदार्थाची भौतिक गुणधर्म आहे, ज्याची व्याख्या एखाद्या वस्तूला त्याच्या तापमानात एकक बदल घडवून आणण्यासाठी पुरवल्या जाणार्‍या उष्मेचे प्रमाण म्हणून केली जाते.
  • उष्मा क्षमतेचे SI एकक ज्युल प्रति केल्विन (J/K) आहे.

गणना:

दिलेल्याप्रमाणे​:

वस्तुमान, m = 2.5 किलो, ΔT = 10°C, विशिष्ट उष्मा क्षमता, c = 500 Jkg-1K-1

उष्मा क्षमता = m x c = 2.5 x 500 = 1,250 JK-1

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