After seeing this data the two most effective look chemical at resisting energy was CaCl2 and LiCl. So we looked at the price of both of this chemical CaCl2 cost 6.55$ per 500g and LiCl cost 32.75$ per 500g because CaCl2 was substantially cheaper we decide to chose it to use in own hand warmer. We calculated that it would take 22g of CaCl2 to create a 20oC increase in temperature of 100ml of water. Some sources of error in this lab, would be heat escape from not be able to replace the lid of the calorement went adding chemical into it, inaccuracies in the balance, and not waiting of the proper time to recode the
However, if you shake the can before opening it, the gasses become more pressurized. When you open the can, the gasses will shoot out and the contents explode. When the CO2 erupts from the lake, CO2 is 1.5 times denser than air so it hovers there as a cloud. This cloud can travel downhill. The CO2 cloud can travel very quickly and very far, ultimately killing everything in its path.
The Law of Inertia is the net force of the object greater than the gravity pulling it down and it will stay at rest until something happens(Getting a Bang Out of Breath Spray). It stays at rest until an unbalanced force makes the object go into motion( Getting a Bang Out of Breath Spray.) Is it true that when the kinetic energy of a canister launched straight up is at its maximum, the potential energy is near zero, and vice versa. It is false, the potential energy reaches its maximum during flight but returns to 0 when the canister reaches the ground(Getting a Bang Out of Breath Spray). What would a graph of pressure in the canister vs. time after spark ignition look like?
If dry ice is placed in Coca Cola, then it will sublimate the fastest because the carbonation bubbles that are in Coca Cola will scrape the sides of the piece of dry ice creating friction and heating it up the fastest. Table 1. Experimental Variables
Interestingly enough, Boyle's gas law, Gay-Lussac's gas law, and Avogadro's gas law are connected in a way similar to how branches are connected to a tree. If the Ideal gas law can be considered the 'trunk' of the tree, then Boyle's, Gay- Lussac's , and Avogadro's gas laws are the 'branches'. To better understand this analogy, it is important to understand how each of the laws can be derived from the Ideal Gas Law. Gay-Lussac's law states that the pressure of an ideal gas is directly proportional to its temperature in kelvin, assuming that the amount of gas and the volume of the gas remain constant. The equation for Gay-Lassac's law would look something like: V = T k, where V is volume, T is temperature, and k is a constant.
What happened was that as the water inside the can was getting heated, the molecules started to spread and get less dense, and the molecules started to leave the can. The outside air, though, was cooler than the air inside the can, so the molecules of
For Part C, 1.0atm of N2 gas was added to the vessel, bringing the total pressure to
When the device heats the liquid, it turns into a vapor,
The equation developed throughout this investigation is another way to writing Newton’s law of cooling. In this equation, 61.4 is the initial temperature of the water, and because 0.982 is less than 1, it suggests that the temperature is constantly decreasing. The Newtons law of cooling could be used to help solve a coffee drinker’s dilemma, where the coffee drinker is confused whether it is more effective to add milk and stir the coffee and wait for 10 minutes or should they wait 10 minutes and then add milk to the coffee. An assumption that has to be made to this scenario is what Newton assumed while conducting his practical work of this theorem.
Year 11 Tutorial Video Hey Year 11, what’s up and welcome to this video. Now this video is going to be a heap of fun. Today we are going to look at Gas Laws! Okay so to outline this video, I will be: Explaining the gas laws
When the recoil stopped, the compressed air in the second cylinder exerted pressure to
Carefully, 15-20g of pre-cooled cyclohexane was poured into the freezing-point tube, the tube recorked, and the whole thing was reweighed, to find the exact mass of the cyclohexane. The dry thermistor and stirrer were inserted into the FP tube, ensuring they were immersed in the liquid. A large beaker was filled with ice and water, which the FP tube was placed into. The cooling curve was determined by recording the temperature at regular time intervals (every fifteen seconds) as the cyclohexane cooled, until the temperature became constant. The cyclohexane was stirred continuously.
The gas particles collide with each other and the wall of container with higher frequency and this will exert a higher pressure. The kinetic energy remains the same and temperature remains constant. Charles’ Law ( Law of Volume ) reveals that when pressure is kept constant, the volume of gas is directly proportional to the temperature of the gas in kelvin. Relating this back to molar volume, the higher the temperature, the higher the volume the gas occupies. When a certain amount of gas is heated to a higher temperature, the gas particles will have higher kinetic energy.
Vessel A is filled with pure water, while vessel B is filled with a solution containing on mass basis 50 percent of water and 50 percent lithium bromide (LiBr salt). Initially the valve connecting these two vessels is closed, and both vessels are at thermal equilibrium with the surroundings, which is at 30oC. At 30oC, the saturation pressure of water is 4.24 kPa, and the equilibrium vapour pressure of water-lithium bromide solution (50 : 50 by mass) at 30oC is 1.22
This paper will discuss the gas laws which are: Avogadro’s principle, Boyle’s law and Charles’ law. Almost every undergraduate and graduate chemistry book introducing the ideal gas with these three laws. These laws are constantly made of pressure, volume, amount of gas and temperature. The ideal gas law is PV=nRT. The three laws of gas define the relationship between pressure (P), volume (V), amount of gas (n) and temperature (T).
