Substance example sentences

However, some of the substances like fructose and some amino acids are absorbed with the help of the carrier ions like Na+.The magnitude of rise in temperature depends on the heat capacity (C) of a substance.Table 1 gives values of standard enthalpy changes of fusion and vaporisation for some substances.During digestion, food is broken down into simpler substances.Why has this black substance formed? This is because oxygen is added to copper and copper oxide is formed.If a substance gains oxygen during a reaction, it is said to be oxidised.Fresh water is therefore, the most precious substance on earth.In this chapter, you will learn the mechanisms of elimination of these substances with special emphasis on common nitrogenous wastes.The substances which contaminate the air are called air pollutants.Suppose, you are a chemical engineer and want to know how much heat is required to decompose calcium carbonate to lime and carbon dioxide, with all the substances in their standard state.Metals are hard substances that conduct heat and electricity and have a characteristic lustre or shine.Actually, chemical reactions involve the breaking and making of bonds between atoms to produce new substances.A molar property, ?m, is the value of an extensive property ? of the system for 1 mol of the substance.Liver, the largest gland in our body, secretes bile-containing substances like bilirubin, biliverdin, cholesterol, degraded steroid hormones, vitamins and drugs.Addictive behaviour, whether it involves excessive intake of high calorie food resulting in extreme obesity or involving the abuse of substances such as alcohol or cocaine, is one of the most severe problems being faced by society today.