Question: A 250-V, 4-pole, wave-wound d.c. series motor has 782 conductors on itsarmature. It has armature and series field resistance of 0.75 ohm. The motor takesa current of 40 A. Estimate its speed and gross torque developed if it has a flux per pole of 25 mWb Answer: Step 1 Mechanical Engineering homework question answer, step 1, image 1 Mechanical Engineering homework question answer, step 1, image 2 Step 2 Mechanical Engineering homework question answer, step 2, image 1 Step 3 Mechanical Engineering homework question answer, step 3, image 1

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Answer:

Step 1 of 2

We have to calculate  for the following reaction.

The reaction is:

First we write the ionic form of this reaction, and then this will be as:

Now, the entropy values of above ions are shown in the table below:

Step 2 of 2

So, the entropy change in the reaction will be:

Putting the values we get:

Hence, the value of isfor the reaction between silver nitrate with potassium chloride.