activation energy g

Draw a triangle ABC. Mark the mid-points of BC, AC and AB as D, E and F respectively. Join AD, BE, CF. AD, BE and CF are the three medians of D ABC. They pass through (or meet) at the same point (or common point). G is the point of concurrence of the medians. It is called as centroid...

Concept of Activation Energy - For a reaction to occur, reactant molecules must collide with each other. Only those collisions result in product formation which have energy equal or more than a certain minimum energy. This energy is called the thres..

Therefore, for a given molecular diameter, the collision frequency will also have a square-root dependency on temperature. The ratio of Z values at two temperature values, for e.g., at 298 K and 308 K will be A ten-degree rise in temperature near the room temperature usually doubles the r..

Active Absorption - Movement of ions from the outer space of the cell to the inner space is generally against the concentration gradient and hence requires energy. This energy is obtained through metabolism either directly or indirectly. Various evidences indicate the ..

The transport of materials across the cell membranes with the help of energy is called active transport. Both diffusion and osmosis are passive transport mechanisms, not requiring energy. Active transport helps in the transport of ions across the membranes of..

Movement of ions from the outer space of the cell to the inner space is generally against the concentration gradient and hence requires energy. This energy is obtained through metabolism either directly or indirectly. Various evidences indicate the active uptake ..

This process is much faster and requires energy. A membrane pump operates across the cell membranes which transports the nutrients from the lumen of the intestine into the cells. This transport occurs with the help of ATP molecules. The carrier proteins in the membrane act as ATPases and..

It is a process by which certain substances like glucose molecules are transported against the concentration gradient. The carrier proteins in the cell membrane carry out the process. The substance present in the medium binds with the active site on the carrier protein forming a comp..

Energy Transfer and Energy Transformation - Energy is the capacity to do work. All living organisms require energy for carrying on their vital metabolic activities. The primary source of energy for living system is solar radiation. The rad..