question_answer

A Carnot engine takes \[3\times {{10}^{6}}\] cal of heat from a reservoir at \[{{627}^{o}}C\] and gives it to a sink at \[{{27}^{o}}C\]. The work done by the engine is                                                              [AIEEE 2003]

A)  \[42\times {{10}^{6}}\]J       

B)       \[8.4\times {{10}^{6}}\]J

C)  \[16.8\times {{10}^{6}}\]      

D)       Zero

Correct Answer: B

Solution :

[b] Given,

cal

cal

Now, work done