First and fifth reaction shows endothermic reaction while the rest of it shows exothermic reaction.
<h3>What reaction shows exothermic and endothermic reaction?</h3>
The reaction between ammonium nitrate and water is an example of endothermic reaction because it absorbs heat from the surrounding environment.
Three drops of concentrated sulfuric acid added to 100 milliliters of water in a beaker makes the beaker hot because exothermic reaction occur.
Ammonium chloride dissolved in a beaker of water makes the beaker cold which shows that it is exothermic reaction because heat leaves the solution.
Uranium atoms are split to produce nuclear energy is an example of exothermic reaction.
Water separates into hydrogen and oxygen when an electric current is run through it that shows endothermic reaction.
Methane and oxygen are combined to produce methanol and heat is an example of exothermic reaction.
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the two process that occur in a cell are
oxidation: this is loss of electron by electrode. the metal electrode loaes electrons and get oxidized and forms ions
the ions get migrated to solution
Reduction: here the ions present in solution gains electron and get deposited on electrodes.
so gain of electrons is by ions
electrode gains electrons is where reduction occurs, and the half cell in which the electrode loses electrons is where oxidation occurs.
chemist is trying to prepare a solution of molarity 1.60 M by diluting a 2.13 M solution. This is a dilution equation and dilution formula needs to be used
c1v1 = c2v2
where c1 is concentration and v1 is volume of the more concentrated solution
c2 is concentration and v2 is volume of the diluted solution to be prepared
substituting the values in the equation
2.13 M x 1.24 L = 1.60 M x v2
v2 = 1.65 L
the volume of the diluted solution is 1.65 L
We can use the ideal gas law equation to solve for the number of moles present
PV = nRT
P - pressure - 107 kPa
V - 39.0 x 10⁻⁶ m³
n - number of moles
R - 8.314 Jmol⁻¹K⁻¹
T - temperature in K - 27 °C + 273 = 300 K
Substituting these values into the equation
107 000 Pa x 39.0 x 10⁻⁶ m³ = n x 8.314 Jmol⁻¹K⁻¹ x 300 K
n = 1.67 x 10⁻³ mol
When <span>you mix muriatic acid and phenolphthalein indicator together, the solution is colorless. Phenolphthalein indicator will turn pink to basic compounds only not acidic solutions.</span>