it is unanswered
The reaction of ammonium hydroxide (NH4OH) with water is generally considered endothermic. When NH4OH dissolves in water, it absorbs heat from the surroundings, leading to a decrease in temperature. This is why you may feel a cooling effect when handling a solution of ammonium hydroxide.
CH4 + 2O2 📷 CO2 + 2H2O + Heat
The reaction 2K(s) + Br2(l) → 2KBr(s) represents a combination reaction where potassium (K), a solid metal, reacts with bromine (Br2), a liquid halogen, to form potassium bromide (KBr), a solid ionic compound. This reaction is exothermic, releasing energy as heat and light due to the formation of strong ionic bonds in KBr. The reactants are in their standard states, and the reaction typically occurs rapidly and can be quite vigorous, especially with potassium, which is highly reactive.
It is an exothermic reaction. There are multiple ways to think about this. The reactants are in the gas phase and thus have a lot of energy within the molecules. When they react to produce a liquid, which has much less energy in its molecules. The energy must be released to the environment to lower the energy of the bonds.
The given equation represents a combustion reaction, where methane (CH4) reacts with oxygen (O2) to form carbon dioxide (CO2) and water (H2O). The release of 218 kcal indicates that this reaction is exothermic, releasing heat energy.
endothermic
exothermic
The reaction shown in the thermochemical equation is an exothermic reaction. This is because heat is a reactant (on the left side of the equation) and is released during the reaction.
No. It is endothermic because it absorbs energy.
When H2O reacts with CaCl2, it is an exothermic reaction because it releases heat to its surroundings. This is because the formation of bonds in the products is stronger than the bonds in the reactants, resulting in the release of energy in the form of heat.
The equation 2K + Br2 -> 2KBr is balanced as there are equal numbers of atoms of each element on both sides of the reaction.
exothermic reaction When energy is released in a chemical reaction it is called an exergonic reaction. One example of an exergonic reaction is cellular respiration in both plants and animals. It is represented by a negative change in free energy (-∆G). An exothermic reaction is only the release of energy as heat, so the more correct answer would be an exergonic reaction, which is the release of energy.
The reaction 4Al + 3O2 -> 2Al2O3 is exothermic. This is because it releases energy in the form of heat during the reaction. The formation of aluminum oxide (Al2O3) from aluminum (Al) and oxygen (O2) is accompanied by a decrease in enthalpy, resulting in the release of heat energy.
endothermic
CH4 + 2O2 📷 CO2 + 2H2O + Heat
36oC
An exothermic chemical reaction.