What type of reaction is represented by the following example? 2CO2 (g) + 4H2O (l) + 1452 kJ 2CH3OH (l) (g) + 3O2 (g) exothermic
2 answers:
Answer : The given reaction is an example of endothermic reaction.
Explanation :
Endothermic reaction : It is a type of chemical reaction in which the energy is absorbed by the surroundings. In this reaction, the energy of reactants are less than the energy of products. In this reaction, the energy is given to the system.
Exothermic reaction : It is a type of chemical reaction in which the energy is released into the surroundings. In this reaction, the energy of reactants are more than the energy of products. In this reaction, the energy is released from the system.
The given balanced chemical reaction is,
In this reaction, the 1452 KJ energy is given to the system. So, the given reaction is an example of endothermic reaction.
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Answer: Heat of the solution = mass water × specific heat water × change in temperature
mass water = 260ml (1.00g/ml ) = 260g
specific heat of water = c(water) = 4.184J/ g°C
Heat change of water = final temperature - initial temperature
= 26.5 - 21.2
= 5.3 °C
H = 260 g ( 4.184J/g°C ) (5.3°C) = 5765J
Molar heat =
= 16473J/mol
Explanation: finding molar heat requires first to look at specific heat of water and the change of water temperature