A carnote's engine is made to work between 200°C` and 0°C` first and then between 0°C` and minus 200°C. Compare the values of efficiencies in the two cases.

A Carnot engine is working between temperatures of 27°C and 327°C . Find its efficiency

Consider the points A(2,-3,0) and B (-1,1,c) Find the distance between A and B

A Carnot engine working between 527°C and 127°C has a work output of 800 J per cycle.How much heat is supplied to the engine from the source per cycle?

Distinguish between A and B? c) Give two examples of crystals showing this defect.

The bond dissociation energy of B-F in BF_3 is 646 kJ mol^(-1) , whereas that of C-F in CF_4 is 515 kJ mol^(-1) . The correct reason for higher B-F bond dissociation energy as compared to that of C-F is the : smaller size of B atom as compared to that of C atom.; stronger sigma bond between B and F in BF_3 as compared to that between C and F in CF_4 ; significant p pi-p pi interactions between B and F in BF_3 , whereas there is no possibility of such interaction between C and F in CF_4 ; lower degree of p pi-p pi interactions between B and F in BF_3 than that between C and F in CF_4

5J of work is done in moving a positive charge of 0.5C between two points. What is the potential difference between the points?