Ihe atụ anọ nke ajụjụ gbasara oke okpomọkụ na ikike okpomọkụ kpọmkwem
1. Olee nke na-ekpo ọkụ ngwa ngwa ma a kpọọ ya ọnụ n'anwụ na-ekpo ọkụ, aluminom ma ọ bụ ọla kọpa? Okpomọkụ kpọmkwem nke aluminom = 900 J/kg o C na okpomọkụ kpọmkwem nke ọla kọpa = 390 J/kg o C.
Mkparịta ụka
Ka okpomọkụ kpọmkwem nke ihe na-adịkwu ukwuu, otú ahụ ka ọ na-ewe ogologo oge ka ihe ahụ kpoo ọkụ, n'aka nke ọzọ, ka okpomọkụ kpọmkwem nke ihe na-adị obere, otú ahụ ka ọ na-ekpo ọkụ ngwa ngwa.
Okpomọkụ kpọmkwem nke ọla kọpa dị obere karịa okpomọkụ kpọmkwem nke aluminom, ya mere ọla kọpa na-ekpo ọkụ ngwa ngwa.
2. Ihe dị kilogram abụọ na-amịkọrọ kalori 100 nke okpomọkụ mgbe okpomọkụ ya gbanwere site na 20 o C ruo 70 o C. Okpomọkụ kpọmkwem nke ihe ahụ bụ...
Mkparịta ụka
A maara na:
Ibu (m) = 2 kg = 2000 gr
Okpomọkụ (Q) = 100 cal
Mgbanwe okpomọkụ (Δ T) = 70 o C – 20 o C = 50 o C
A jụrụ: Okpomọkụ kpọmkwem nke ihe ahụ (c)
Azịza:
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 g 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
Okpomọkụ kpọmkwem nke ihe ahụ bụ 10 -3 cal/gr o C
3. Okpomọkụ mmiri kpọmkwem bụ 4180 J/kg C o . Ike okpomọkụ nke kilogram 2 nke mmiri bụ…..
Mkparịta ụka
A maara na:
Okpomọkụ mmiri kpọmkwem (c) = 4180 J/kg C o
Ibu (m) = 2 kg
A jụrụ: Ike okpomọkụ (C)
Azịza:
C = mc
C = (2 kg)(4180 J/kg C o )
C = (2)(4180 J/C o )
C = 8360 J/C o
4. Okpomọkụ kpọmkwem nke aluminom bụ 900 J/kg C o . Ike okpomọkụ nke gram 2 nke aluminom bụ…..
Mkparịta ụka
A maara na:
Okpomọkụ kpọmkwem nke aluminom (c) = 900 J/kg C o = 9 x 10 2 J/kg C o
Ibu (m) = gram 2 = 2/1000 kg = 2/10 3 kg = 2 x 10 -3 kg
A jụrụ: Ike okpomọkụ (C)
Azịza:
C = mc
C = (2 x 10 -3 n'arọ) ( 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
