Misalai 4 na takamaiman tambayoyin ƙarfin zafi da zafi
1. Wanne ne ke zafi da sauri idan aka busar da shi a rana mai zafi, aluminum ko jan ƙarfe? Takamammen zafin aluminum = 900 J/kg o C da takamaiman zafin jan ƙarfe = 390 J/kg o C.
Tattaunawa
Da yawan zafin wani abu, da tsawon lokacin da zai ɗauka kafin abu ya yi zafi, akasin haka, ƙaramar zafin wani abu, da sauri yake yin zafi.
Takamammen zafin jan ƙarfe ya fi na aluminum ƙanƙanta, don haka jan ƙarfe yana zafi da sauri.
2. Abu mai nauyin kilogiram 2 yana shan kalori 100 na zafi idan zafinsa ya canza daga 20 oC zuwa 70 oC . Takamaiman zafin abin shine...
Tattaunawa
An san cewa:
Nauyi (m) = 2 kg = 2000 gr
Zafi (Q) = 100 cal
Sauyin yanayin zafi (Δ T) = 70 o C – 20 o C = 50 o C
An tambaya: Takamaiman zafin abin (c)
Amsa:
c = Q / m Δ T
c = 100 kalori / (2000 gr)(50 o C)
c = 100 kalori / 100.000 gr o C
c = 10 2 kalori / 10 5 gr o C
c = (10 2 kalori)( 10 -5 gr -1 o C -1 )
c = 10 -3 kalori gr -1 o C -1
c = 10 -3 kalori/ gr o C
Takamaiman zafin da ke cikin abu shine 10 -3 cal/gr o C
3. Takamaiman zafin ruwan shine 4180 J/kg C o . Ƙarfin zafin ruwa na kilogiram 2 shine…..
Tattaunawa
An san cewa:
Takamaiman zafin ruwa (c) = 4180 J/kg C o
Mass (m) = 2 kg
An tambaya: Ƙarfin zafi (C)
Amsa:
C = mc
C = (2 kg)(4180 J/kg C o )
C = (2)(4180 J/C o )
C = 8360 J/C o
4. Takamaiman zafin aluminum shine 900 J/kg C o . Ƙarfin zafin aluminum gram 2 shine…..
Tattaunawa
An san cewa:
Takamaiman zafin aluminum (c) = 900 J/kg C o = 9 x 10 2 J/kg C o
Nauyi (m) = gram 2 = 2/1000 kg = 2/10 kg 3 = 2 x 10 -3 kg
An tambaya: Ƙarfin zafi (C)
Amsa:
C = mc
C = (2 x 10 -3 kg) ( 9 x 10 2 J/kg C o )
C = 18 x 10 -3 x 10 2 J/C o
C = 18 x 10 -1 J/C o
C = 1,8 J/C o
