Once the gas has dissipated, the vinegar and baking soda undergo a chemical transition that results in carbon dioxide.
According to thermochemistry, an exothermic reaction is one in which the overall standard enthalpy change (H) is negative. Heat is often produced via exothermic reactions. Once the gas has dissipated, the vinegar and baking soda undergo a chemical transition that results in carbon dioxide.
Bicarbonate (NaHCO3) is what makes baking soda and acetic acid in vinegar (HCH3COO). The carbon dioxide that results from this process is one of the byproducts that produce bubbles. A chemical reaction occurs when vinegar and baking soda are combined, producing carbon dioxide gas, which fills the balloon and causes it to expand.
Therefore, once the gas has dissipated, the vinegar and baking soda undergo a chemical transition that results in carbon dioxide.
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Answer:
PCBs have high electrical resistance and are excellent insulating materials.
Explanation:
Polychlorinated biphenyls [PCBs] are industrial chemical compounds made by man, which contains carbon, hydrogen and chlorine atoms. They can be used in the production of paints and dyes, heat transfer, etc.
There has been the ban on the use of these compounds because they are said to be very stable, and yield slowly to degradation by nature. They have low and not high electrical resistance.
Answer:
work done by fuel is chemical energy and work done by moving objects is kinetic energy
Explanation:
when work is done by object that object gains energy . when the work is done by an object that object loses energy because it is transferring it to something else .
Answer:
work done by fuel is conversion of chemical energy into mechanical whereas work done by moving object is due to its displacement by the application of force. actually, both of them give same meaning
Answer:
The height of the airplane is 3312.4 meters.
Explanation:
Given that,
Speed of the airplane, v = 1100 km/h = 300 m/s
It takes 26 s for the engine to hit the ground. We need to find the height of the airplane. Using second equation of motion to find it as :
Here, u = 0 and a = g
The height of the airplane is 3312.4 meters.
The object be going at the bottom of the hill with velocity 7.75 m/s.
When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.
Given in the question a 400 kg object is sitting at rest at the top of a hill that is 30.0 m high and 80.0 m long measured along the hill . If there is no friction, velocity with which object be going at the bottom of the hill,
θ =sin^-1(30/80)
θ =22
F = 400 g sin(22) = 150 N
F = ma
150 = 400 a
a = 0.375 m/s²
v² - u²= 2 a s
v² - 0 = 2 x 0.375 x 80
v = 7.75 m/s
The object be going at the bottom of the hill with velocity 7.75 m/s.
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