Two grams of water are sealed in a rigid container; then the water is vaporized by heating. 955 cal of heat is needed for vaporization. What is the change in internal energy of the water? Answer in units of J

Explanation:

According to the first law of thermodynamics:

Here is the change in the internal energy of the system, Q is the supplied heat to the system and W is the work done by the system. The work done by the system is defined as:

Where P is the presion and is the volume change. The volume remains constant, since the water are sealed in a rigid container:

So, the change in internal energy of the water is:

1 cal is equal to 4.186 J, so:

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards