Energetika Kimia (Energetics of chemical)

Energetics of chemical or chemical thermodynamics is part of chemistry that studies the energy changes that accompany a process or reaction. One important aspect studied in chemical thermodynamics adala determination of the heat absorbed or released during the reaction. Heat is defined as thermal energy possessed by a substance. In general, to detect the presence of heat possessed by an object that is by measuring the temperature of the object. If the temperature is high then the heat is contained by the object is very large, and vice versa if the temperature is low then the heat is contained few (Keenan, 1984). From the results of experiments are often carried out the required size of the heat of an object (substance) depends on 3 factors 1. mass substances 2. type of substance (heat type) 3. temperature changes So mathematically can be formulated: Q = m.c. (t2 - t1) Where: Q is the heat required (J) m is the mass of the object (kg) c is the heat type (J / KGC) (T2-t1) is the change in temperature (C) Heat can be divided into 2 types • Heat is used to raise the temperature • Heat is used to change the form (latent heat), which is used in the equation there are two kinds of latent heat Q = mU and Q = mL With U is the heat of steam (J / kg) and L is the heat of melting (J / kg) In the discussion there are two concept of heat that is almost the same but different from the heat capacity (H) and heat type (c). Heat capacity is the amount of heat needed to raise body temperature by 1 degree Celsius. H = Q / (t2-t1) Heat is the number of types of heat required to raise the temperature of 1 kg of substance by 1 degree Celsius. The instrument used to determine the amount of heat is a type of calorimeter. c = Q / m. (t2-t1) When these two equations are linked then formed a new equation H = m.c Analysis of changes in the form of graphs on the ice that is heated until it becomes steam. In this chart can be seen all the heat equation is used. learn more about the Indonesian-language download it here

Pelajari selengkapnya dengan mendownloadnya disini berbahasa indonesia