Jawaban:
Soal hitugan 1
Diketahui :
CaO(s) + H₂O(l) ⇒ Ca(OH)₂(s) ΔH°reaksi = -15, 6 kkal
ΔH⁰ H₂O = - 68,3 kkal/mol
ΔH⁰ CaO = - 151,9 kkal/mol
Tentukan :
ΔH⁰ Ca(OH)₂ = ?
jawab :
ΔH°reaksi = (∈ΔH° hasil reaksi) - (∈ΔH° pereaksi)
- 15,6 kkal = (ΔH° Ca(OH)₂) - ( 1x ΔH° CaO + 1 x ΔH° H₂O)
- 15,6 kkal = (ΔH° Ca(OH)₂) - ( 1x (-151,9) + 1 x (-68,3))
- 15,6 kkal = (ΔH° Ca(OH)₂) - ( - 220,3)
- 15,6 kkal = ΔH° Ca(OH)₂ + 220,3)
ΔH° Ca(OH)₂ + 220,3) = -15,6
ΔH° Ca(OH)₂₃ = - 15,6 - 220,3
= -235,8 kkal/mol
soal hitungan ke 2
diketahui ;
pada 50⁰C
denaturasi protein dengan panas 7000 kal/mol
ΔG = 0
T = 273 + 50
= 323
tentukan
ΔS
jawab
G = H - TS
- TS = G - H
-S = G - H/T
-S = 0 - 7000/323
= -21,67
S = 21,67 kal/mol
semoga bermanfaat
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Jawaban:
Soal hitugan 1
Diketahui :
CaO(s) + H₂O(l) ⇒ Ca(OH)₂(s) ΔH°reaksi = -15, 6 kkal
ΔH⁰ H₂O = - 68,3 kkal/mol
ΔH⁰ CaO = - 151,9 kkal/mol
Tentukan :
ΔH⁰ Ca(OH)₂ = ?
jawab :
ΔH°reaksi = (∈ΔH° hasil reaksi) - (∈ΔH° pereaksi)
- 15,6 kkal = (ΔH° Ca(OH)₂) - ( 1x ΔH° CaO + 1 x ΔH° H₂O)
- 15,6 kkal = (ΔH° Ca(OH)₂) - ( 1x (-151,9) + 1 x (-68,3))
- 15,6 kkal = (ΔH° Ca(OH)₂) - ( - 220,3)
- 15,6 kkal = ΔH° Ca(OH)₂ + 220,3)
ΔH° Ca(OH)₂ + 220,3) = -15,6
ΔH° Ca(OH)₂₃ = - 15,6 - 220,3
= -235,8 kkal/mol
soal hitungan ke 2
diketahui ;
pada 50⁰C
denaturasi protein dengan panas 7000 kal/mol
ΔG = 0
T = 273 + 50
= 323
tentukan
ΔS
jawab
G = H - TS
- TS = G - H
-S = G - H/T
-S = 0 - 7000/323
= -21,67
S = 21,67 kal/mol
semoga bermanfaat