Answer:
In an exothermic reaction the energy gained by the surroundings must be <u>equal to</u> the energy lost by the reaction.
Explanation:
Exothermic reactions occur by the loss of energy in the form of heat to the surroundings (apparatus and the system).
The heat gained can be quantitatively analysed and measured provided no product escapes the system and it is numerically equal to the amount of heat lost by the reaction.
<span>To relate or measure the by the quantity of something, not against the quantity</span>
Answer:
Explanation:
The work (W) done by the gas can be calculated using the following equation:
<u>Where:</u>
p: is the pressure
[tex}V_{f}[/tex]: is the final volume
[tex}V_{i}[/tex]: is the initial volume
In the first process, the work done by the gas is:
Since the volume remains constant, the total work done by the gas is equal to zero.
In the second process, the work done by the gas is:
Now, the total work done by the gas during both processes is:
Therefore, the total work done by the gas during both processes is - 24 kJ.
I hope it helps you!
Liquids are used in a hydraulic system because unlike gases, liquids CAN NOT BE compressed therefore making them the ideal substance for the hydraulic system.
Imagine an incline of length "x". You let the toy go at the top of the incline and measure the time "t" it takes for it to get to the bottom.
The average speed would be "v=x/t".
