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Why does branched-alkanes produce less knocking?
Branched alkanes produce less knocking compared to straight-chain alkanes because their molecular structure allows for more efficient combustion within the engine. The branching reduces the likelihood of premature ignition, as branched alkanes have higher octane ratings, meaning they can withstand greater pressure and temperature before igniting. This leads to smoother combustion and less engine knock, enhancing performance and efficiency. Additionally, the irregular shape of branched alkanes disrupts the formation of shock waves that contribute to knocking.
What patterns do you observe in terms of phase number of carbon atoms structural formula and boiling point of the hydrocarbons?
In general, as the number of carbon atoms in a hydrocarbon increases, the boiling point tends to rise. This is due to the greater surface area and increased van der Waals forces between larger molecules. Additionally, linear hydrocarbons typically have higher boiling points compared to their branched counterparts, as branching decreases surface area and intermolecular interactions. Overall, the phase of hydrocarbons at room temperature can be predicted based on their molecular size, with smaller hydrocarbons being gaseous and larger ones being liquid or solid.
Why alcohol exist in a liquid state while smaller hydrocarbon tend to be gases?
Precisely because of the size of the molecules. Larger molecules have a greater tendency to stick together, because there are more places where they can interact, and thus, a greater total force.
Why germanium shows good reducing properties?
because its size is big and hence have greater tendency to accept electrons.
What is the relatonship between the roughness of a surface and the force of friction?
There is no simple relationship. However, the general tendency is that rougher surfaces have a greater coefficient of friction.
Is a straight angle less then or greater then a 90 dessgres?
it is greater. 180 is a straight angle (straight line).
Why does branched-alkanes produce less knocking?
Branched alkanes produce less knocking compared to straight-chain alkanes because their molecular structure allows for more efficient combustion within the engine. The branching reduces the likelihood of premature ignition, as branched alkanes have higher octane ratings, meaning they can withstand greater pressure and temperature before igniting. This leads to smoother combustion and less engine knock, enhancing performance and efficiency. Additionally, the irregular shape of branched alkanes disrupts the formation of shock waves that contribute to knocking.
What patterns do you observe in terms of phase number of carbon atoms structural formula and boiling point of the hydrocarbons?
In general, as the number of carbon atoms in a hydrocarbon increases, the boiling point tends to rise. This is due to the greater surface area and increased van der Waals forces between larger molecules. Additionally, linear hydrocarbons typically have higher boiling points compared to their branched counterparts, as branching decreases surface area and intermolecular interactions. Overall, the phase of hydrocarbons at room temperature can be predicted based on their molecular size, with smaller hydrocarbons being gaseous and larger ones being liquid or solid.
Why hydrocarbons are used as fuel?
There are two reasons : 1) Higher calorific value 2) Large chain hydrocarbons have high impurities and when broken into smaller chain compounds their volumetric rate increases. So for the same mass we get a higher volume and this translates into greater profitability. There are two reasons : 1) Higher calorific value 2) Large chain hydrocarbons have high impurities and when broken into smaller chain compounds their volumetric rate increases. So for the same mass we get a higher volume and this translates into greater profitability.
How is this turning tendency of the force related to these factor?
The turning tendency of a force is related to the distance from the point of rotation (torque). The longer the distance from the point of rotation, the greater the turning tendency. Additionally, the magnitude of the force and the angle at which it is applied also affect the turning tendency.
What is the measure of intertia in an object?
Inertia is the tendency of an object to remain still, or remain moving at a constant speed in a straight line, unless acted upon by an outside force. Thus the measure of this quality is the mass of an object since acceleration is equal to the force applied to an object multiplied by its mass. The greater the mass, the less acceleration a given force will impart to it. In order to impart greater acceleration to a given mass, greater force is needed.
An objects tendency to resist acceleration is measured by?
An object's tendency to resist acceleration is measured by its inertia, which is the property of matter that causes an object to resist changes in its state of motion. The greater an object's mass, the greater its inertia and resistance to acceleration.
Why does isomerisation turn straight chain alkanes into alkanes with lower boiling temperature?
Isomerisation causes straight chain alkanes to become branched alkanes which prevents the chains from moving to close proximities of each other. This reduces the van der Waal's intermolecular forces between chains so less energy is needed to overcome the forces and thus a lower boiling point.
Which is greater a straight angle and a acute or two obtuse angles?
2 obtuse angles will be greater
What is a key characteristic of inertia?
A key characteristic of inertia is that it is the tendency of an object to resist changes in its state of motion. This means that an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity in a straight line unless acted upon by an external force. Inertia is directly related to the mass of the object; the greater the mass, the greater the inertia.
What will greater mass do to inertia?
Inertia is the resistance of any mass to any change in its state of motion, it is the tendency of objects to keep moving in a straight line at constant velocity.The mass of a body determines the momentum (P) of the body at given velocity (v) ; it is a proportionality factor in the formula:P=mvThe factor (m) is referred to as inertial mass.Thus the greater the mass the larger the momentum.
Why alcohol exist in a liquid state while smaller hydrocarbon tend to be gases?
Precisely because of the size of the molecules. Larger molecules have a greater tendency to stick together, because there are more places where they can interact, and thus, a greater total force.
