Substance example sentences



A luminous flame is seen when the atoms of the gaseous substance are heated and start to glow.This process of conversion of complex food substances to simple absorbable forms is called digestion and is carried out by our digestive system by mechanical and biochemical methods.Many nitrogen containing substances, ions, CO2, water, etc.Some substances like water are unique in their ability of acting both as an acid and a base.The sweat and sebaceous glands in the skin can eliminate certain substances through their secretions.Metals are hard substances that conduct heat and electricity and have a characteristic lustre or shine.The substances that pollute water are called water pollutants.The numerical value of ?rH0 refers to the number of moles of substances specified by an equation.You will observe that a white substance, which is insoluble in water, is formed.Most abusers further develop a dependence on heroin, revolving their lives around the substance, building up a tolerance for it, and experiencing a withdrawal reaction when they stop taking it.If a substance gains oxygen during a reaction, it is said to be oxidised.Most of these substances ultimately pass out alongwith digestive wastes.Standard enthalpies of formation of some common substances are given in Table By convention, standard enthalpy for formation, ?fH0, of an element in reference state, i.e., its most stable state of aggregation is taken as zero.Specific heat, also called specific heat capacity is the quantity of heat required to raise the temperature of one unit mass of a substance by one degree celsius (or one kelvin).Later this volatile substance was identified as ethylene, a gaseous PGR.

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