Calculate the efficiency of a Canot engine operating between 450 K and 300K.

Find the efficiency of a carnot's engine working between 500K and 300K

Find the efficiency of a carnot's engine that works between the temperature 427 degree C and 27 degree C of the source and the sink respectively . If the 140 calories of heat are absorbed from the source by the engine in one cycle calculate the heat rejected into the sink .

Explain the operations of a Canot heat engine working between two temperatures and derive its effeciency.

An inventor claims to have developed an engine working between 600k and 300k of having an efficiency of 52% . Comment on his claims .

The efficiency of a Carnot engine is frac(1)(6) when temperature if the sink decrease by 65 K its efficiency becomes frac(1)(3) . Calculate the initial and final temperature.

Calculate the boiling point of a solution prepared by adding 15.00g of NaCl to 250g water. (K_b for water = 0.512 K kg mol^-1, molar mass of NaCl, 58.44g mol mol^-1 .

The temperature of source and sink of a carnot engine are 400K and 300k respectively its efficiecy is

The rate of reaction quadruples when the temperature changes from 293 K to 313 K. Calculate the energy of activation of the reaction assuming that it does not change with temperature.

Calculate the mean KE of one mole of helium gas at 300 K.

Calculate the freezing point of an aqueous solution containing 10.50g of MgBr_2 = 184g, K_f for water = 1.86 K kg mol^-1 .