Question

540 calories of heat convert 1 cubic centimeter of water at 100°C into 1671 cubic centimeter of steam at 100°C at
a pressure of one atmosphere. Then the work done against the atmospheric pressure is nearly
(A) 540 cal
(B) 40 cal
(C) Zero cal
(D) 500 cal​

Answer 1

Work against atmospheric pressure is nearly 40 cal.

Explanation:

• In this question, the work done against the atmospheric pressure is asked. when the water is converted to steam at the given conditions.
• The work done can be calculated using the formula            $W = P (V2-V1) = 10^{5} (1651-1) X 10^{-6} joules$  
• To convert the above equation from Joules to calories we should divide by 4.2  $W =[10 ^{5} (1651-1) X 10^{6} ] / 4.2 = 40 Cal$ . Thus the work done against atmospheric pressure is 40 Cal.

To learn more:

Explain the laws of thermodynamics

https://brainly.in/question/8463898

what is atmospheric pressure?

https://brainly.in/question/1524997'