A2.00-kg block of aluminum at 50.0 °c is dropped into 5.00 kg of water at 20.0 °c. what is the change in entropy during the approach to equilibrium, assuming no heat is exchanged with the environment? the specific heat of aluminum is 0.22 cal/(g∙k).

Given:

= 323 K

= 293 K

specific heat of aluminium,

specific heat of water,

Formula Used:

Q = m

Solution:

Let the temperature at equilibrium be ' ' K

Now at equilibrium, using the given formula:

Temperature at equilibrium, =  295.513 K

Now, change in entropy(in J/K) is given by:

Q = m

= 12094.28 cal

Now,

= 40.93 cal/K = 9.78 J/K

Therefore change in entropy is given by:

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary