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In van der Waal’s equation, b is known as __________.
  • a)
    volume constant
  • b)
    pressure constant
  • c)
    volume correction
  • d)
    pressure correction
Correct answer is option 'C'. Can you explain this answer?
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In van der Waal’s equation, b is known as __________.a)volume co...
In the van der Waal’s equation (P – an2/V2)(V – nb) = nRT, b is the volume correction term and is 4 times as the volume of a molecule. The letter a is the pressure correction term in the van der Waal’s equation.
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Directions:Read the passages and choose the best answer to each question.PassageFriction is the resistance to the movement of one object past another object with which the first object is in contact.A group of students performed several experiments using rectangular blocks of various materials and a smooth inclined plane 2 meters in length. To compare how different materials are affected by friction, the blocks were placed at the top of the plane and released to travel the 2-meter distance. The time in seconds (s) that it took for each block to reach the end of the inclined plane was recorded.Experiment 1The group of students wanted to know which materials moved down the plane in the shortest amount of time. The students used blocks of wood, steel, aluminum, glass, plastic, and concrete. The dimensions of each block were the same, the volume of each block remained constant, and the mass of the blocks was varied. The incline of the plane was set at 45 for each trial. The students conducted 3 trials for each material, and recorded the results in Table 1.Experiment 2The students conducted a similar experiment as in Experiment 1 to test the effect of volume on the time that it took for the blocks to move down the inclined plane. The results are shown in Table 2.Experiment 3Objects can be rated according to their ability to move efficiently. The students created a scale from 5 to 30 (least to most resistant to motion due to friction) and tested four objects of a known rating. Three trials were conducted for each object, using the same methods as in Experiment 1. The results are shown in Table 3.Q.In which of the following ways are the designs of Experiments 1 and 2 different?

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In van der Waal’s equation, b is known as __________.a)volume constantb)pressure constantc)volume correctiond)pressure correctionCorrect answer is option 'C'. Can you explain this answer?
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