question archive The following thermochemical equation shows the combustion of ethanol, C2H5OH in excess oxygen
The following thermochemical equation shows the combustion of ethanol, C2H5OH in excess oxygen
Subject:ChemistryPrice: Bought3
The following thermochemical equation shows the combustion of ethanol, C2H5OH in excess oxygen.
C2H5OH(ce/l) + 3O2(g/g) ® 3H2O(ce/l) + 2CO2(ak/aq) DH = -p KJmol-1
Apakah jisim etanol, C2H5OH, yang digunakan jika etanol dibakar dengan lengkap untuk membebaskam q KJ haba?
[Jisim molar etanol = 46 g mol-1]
What is the mass of ethanol, C2H5OH, if the ethanol is burnt completely to release q KJ of heat?
[Molar mass of ethanol = 46 g mol-1]
A) 46q/p
B) 46p/q
C) q/46p
D) p/46q
100 cm3 jus limau kasturi ditambahkan kepada 300 cm3 susu segar. Jika suhu meningkat sebanyak 5°C, hitungkam perubahan haba.
[Muatan haba tentu campuran : x J g-1 °C-1]
100 cm3 of calamansi juice is added to 300 cm3 of fresh milk. If the temperature rises by 5°C, calculate the heat change.
[Specific heat capacity of mixture : x J g-1 °C-1]
A) 80x J
B) 1600x J
C) 2000x J
D) 2500x J
