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Výpočet tepla

PROVĚRKY. Výpočet tepla. 1. Vypočítej chybějící veličiny. Skupina A. Skupina B. Q = m . c . Δ t , 100 g = 0,1 kg , 0,383 kJ/kg.°C = 383 J/kg.°C Q = 0,1 . 383 . 300 Q = 11 490 J. m = Q : (c . Δ t) , 100 kJ = 100 000 J , 0,720 kJ/kg.°C = 720 J/kg.°C

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Výpočet tepla

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  1. PROVĚRKY Výpočet tepla

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  3. Vypočítej chybějící veličiny Skupina A Skupina B Q = m . c . Δt , 100 g = 0,1 kg , 0,383 kJ/kg.°C = 383 J/kg.°C Q = 0,1 . 383 . 300 Q = 11 490 J m = Q : (c . Δt) , 100 kJ = 100 000 J , 0,720 kJ/kg.°C = 720 J/kg.°C m = 100 000 : (720 . 85) m = 1,63 kg m = Q : (c . Δt) , 10 kJ = 10 000 J , 0,720 kJ/kg.°C = 720 J/kg.°C m = 10 000 : (720 . 93) m = 0,149 kg Δt = Q : (m . c) , 2,05 GJ = 2 050 000 000 J , 3 t = 3 000 kg , 0,450 kJ/kg.°C = 450 J/kg.°C Δt = 2 050 000 000 : (3 000 . 450) Δt = 1 518,5 °C Δt = Q : (m . c) , 1,45 GJ = 1 450 000 000 J , 5 t = 5 000 kg , 0,450 kJ/kg.°C = 450 J/kg.°C Δt = 1 450 000 000 : (5 000 . 450) Δt = 644,4 °C Q = m . c . Δt , 1,5 g = 0,001 5 kg , 0,129 kJ/kg.°C = 129 J/kg.°C Q = 0,001 5 . 129 . 1 000 Q = 193,5 J

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  5. Vypočítej chybějící veličiny Skupina A Skupina B m = Q : (c . Δt) , 0,05 MJ = 50 000 J , 4,18 kJ/kg.°C = 4 180 J/kg.°C m = 50 000 : (4 180 . 200) m = 0,059 8 kg Δt = Q : (m . c) , 53,76 kJ = 53 760 J , 0,04 t = 40 kg , 0,896 kJ/kg.°C = 896 J/kg.°C Δt = 53 760 : (40 . 896) Δt = 1,5 °C Q = m . c . Δt , 8,5 dag = 0,085 kg , 0,896 kJ/kg.°C = 896 J/kg.°C Q = 0,085 . 896 . 50 Q = 3 808 J m = Q : (c . Δt) , 4,05 MJ = 4 050 000 J , 4,18 kJ/kg.°C = 4 180 J/kg.°C m = 4 050 000 : (4 180 . 185) m = 5,24 kg Δt = Q : (m . c) , 15,32 kJ = 15 320 J , 0,02 t = 20 kg , 0,383 kJ/kg.°C = 383 J/kg.°C Δt = 15 320 : (20 . 383) Δt = 2 °C Q = m . c . Δt , 4,5 dag = 0,045 kg , 0,383 kJ/kg.°C = 383 J/kg.°C Q = 0,045 . 383 . 500 Q = 8 617,5 J

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  7. Vypočítej chybějící veličiny Skupina A Skupina B m = Q : (c . Δt) , 0,003 5 GJ = 3 500 000 J, stříbro = 235 J/kg.°C m = 3 500 000 : (0,235 . 150) m = 99 290,8 kg Δt = Q : (m . c) , 0,5 GJ = 500 000 000 J , 15 t = 15 000 kg , železo = 450 J/kg.°C Δt = 500 000 000 : (15 000 . 450) Δt = 74,07 °C m = Q : (c . Δt) , 8 050 kJ = 8 050 000 J , led = 2 090 J/kg.°C m = 8 050 000 : (2 090 . 5) m = 770,3 kg Q = m . c . Δt , 8,5 t = 8 500 kg , platina = 133 J/kg.°C Q = 8 500 . 133 . 100 Q = 113 050 000 J Q = m . c . Δt , 45 g = 0,045 kg , aceton = 2 160 J/kg.°C Q = 0,045 . 2 160 . 20 Q = 1 944 J Δt = Q : (m . c) , 0,75 kJ = 750 J , 25 g = 0,025 kg , ethanol = 2 430 J/kg.°C Δt = 750 : (0,025 . 2 430) Δt = 12,35 °C

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