Answer:
Watt or W/m^2
because it is i guess ;--;
Answer: Option (3) is the correct answer.
Explanation:
A reaction due to which there occurs change in chemical composition of reactants is known as a chemical reaction.
For example, evolution of heat when two substances combine together shows a chemical reaction has taken place between the substances.
Whereas a reaction which does not bring any changes in chemical composition of the reactants is known as a physical reaction.
For example, boiling point, melting point, mass, volume etc are all physical properties.
Thus, we can conclude that out of the given options a substance melts when sitting in the Sun, is not an indication of a chemical reaction.
<span>The value of enthalpy of a reaction can be a useful tool in determining the type of reaction it is. If the enthalpy is negative the reaction is exothermic and if the enthalpy is positive the reaction is endothermic. Hope this answers the question. Have a nice day.</span>
Answer:
12 hydrogen + 12 hydrogen = 24 hydrogen
Hydrogen was transferred from sugar and water on the left to water on the right releasing
Explanation:
Answer:
0.7824 KJ
Explanation:
Given data:
Mass of iodine = 25.4 g
Amount of heat required to melt = ?
Solution:
The heat of fusion of iodine is 7.824 Kj /mol
Number of moles of iodine = 25.4 g/ 254 g/mol
Number of moles of iodine = 0.1 mol
The amount of heat required to melt one mole of iodine is 7.824 Kj /mol
For 0.1 mol;
7.824 Kj /mol × 0.1 mol
0.7824 KJ
