An exothermic reaction involves heat leaving the system in which the reaction is taking place. This measurement of heat quantity is known as enthalpy, and is one of the measurements required to calculate the Gibbs free energy change.
The equation dG=dH-TdS, where dG is Gibbs free energy change, dH is enthalpy change, T is temperature (kelvin), and dS is entropy change (measurement of system disorder), is used to calculate the Gibbs change.
In an exothermic reaction, heat is lost, as said earlier (dH<0), and the entropy usually increases (dS>0, typically large molecules will break apart into smaller molecules, increasing the disorder). Because temperature can never be negative, we have a general system that looks like this:
dG = negative - negative = more negative
so, an exothermic system typically has a dG<0.
The mass of the silver : 4.6 g
<h3>Further explanation </h3>
Heat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
∆T = temperature difference :
The specific heat of silver is 0.235 J/gºC
Q = heat = 26 J
The mass :
The term "solution" is more frequently used when a homogeneous mixture is a liquid, although it is sometimes used if the homogeneous mixture is a gas. Another name for a solid homogeneous mixture of metals is an alloy.
Compound A: Acetophenone
Compound B: Propyl Benzene
The mass spectrum for compound A has a base peak at m/z = 105 which is for benzylidyneoxonium ion, and Compound B has a stable peak at m/z = 91 which is for Benzylium cation and rearranges to tropyllium cation and giving a peak at m/z at 91. And both compound A and B when treated with chromic acid produces Benzoic Acid.
Answer:
Speed
Explanation:
Aliyah must have been trying to find her speed.
The speed is a measure of how fast an object or a body is and it is calculated by finding the ratio of distance with time. Mathematically,
speed = with a unit of m/s.
<em>Hence, with the distance measured on the ground and Aliyah trying to find the time it will take her to cover the distance while running, she must have been trying to find how fast she can run, that is, speed. </em>