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Arada [10]
3 years ago
10

2. You used a calorimeter in the Heat Transfer lab. Explain how the calorimeter works, and how to calculate the heat given off o

r absorbed by the reaction being studied.
Chemistry
1 answer:
Phoenix [80]3 years ago
6 0
A calorimeter works by having a known mass of known material combust or react in an enclosed space. The calorimeter has an agent for absorption of the heat released during the process of combustion or reaction. For example, the heat absorbing agent may be water. The change in temperature of the heat absorbent along with its specific heat capacity and mass are used to compute the energy released using the equation:
Q = mCΔT
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A balloon is filled to a volume of 2.20L at a temperature of 22*C. The balloon is then heated to a temperature of 71*C. Find the
goldfiish [28.3K]

2.565L

Explanation:

  • Charles law states that the volume of an ideal gas at constant pressure is directly proportional to the absolute temperature.V/T=K

         V1/T1=V2/T2        

          Unit of Kelvin = 273.15

  • To get the absolute temperature, we need to convert the degree celsius temperature to kelvin.

          T1= 22+273.15= 295.15 K

          T2 = 71+273.15= 344.15 K

          V1 = 2.20 L

          V2 =?

          2.20/295.15=V2/344.15

          0.00745 x 344.15 = 2.565 L

Hence,  2.565 L is the new volume of the balloon.

3 0
3 years ago
For the reactions system 2H2(g) + S2(g) 2H2S(g), a 1.00 liter vessel is found to contain 0.50 moles of H2, 0.020 moles of S2, an
Mnenie [13.5K]

Answer: 1) 2H_2(g)+S_2(g)\rightleftharpoons 2H_2S(g)

Equilibrium constant is defined as the ratio of the product of concentration of products to the product of concentration of reactants each term raised to their stochiometric coefficients.

K_{eq}=\frac{[H_2S]^2}{H_2]^2\times [S_2]}

where [] = concentration in Molarity=\frac{moles}{\text {Volume in L}}

Thus [H_2S]=\frac{68.5}{1.0}=68.5M

[H_2]=\frac{0.50}{1.0}=0.50M

[S_2]=\frac{0.020}{1.0}=0.020M

K_{eq}=\frac{[68.5]^2}{0.50]^2\times [0.020]}=938450

As the value of K is greater than 1, the reaction is product favored.

2) N_2O_4(g)\rightleftharpoons 2NO_2(g)

K_{eq}=\frac{[NO_2]^2}{[N_2O_4]}

K_{eq}=\frac{[0.500]^2}{[0.0250]}=10

3) N_2+3H_2\rightleftharpoons 2NH_3

K_{eq}=\frac{[NH_3]^2}{[N_2]\times [H_2]^3}

4) Reactions which do not continue to completion are called equilibrium reactions as the rate of forward reaction is equal to the rate of backward direction.


3 0
3 years ago
Read 2 more answers
Help please ASAP just with number 10
Dafna11 [192]

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8 0
3 years ago
1.which of the following were found to destroy ozone in the upper atmosphere?
AysviL [449]
Below are the answers:

1.b - cfcs
2.d - <span>carbon dioxide,smog,acid rain. </span>
3.a - <span> laws and treaties that limit or ban pollutants</span>
4.c - <span>burning leaves and brush
</span>
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
5 0
3 years ago
The waste product of photosynthesis is: carbon, oxygen, nitrogen, carbon dioxide
Anika [276]
The waste product is oxygen.
6 0
3 years ago
Read 2 more answers
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