Measurements of a gasoline engine show that it has anefficiency of 0.196 and that it exhausts 4.96 * 108 J of heat during20 minutes of operation. During that time, (a) how much heat does theengine take in and (b) how much work does the engine do?

(a) What is the efficiency (in percent) of a cyclical heat engine in which 30.0 k) of heat transfer occurs to the environment for every 50.0 kJ of heat transfer into the engine? % hob) How much work (in kJ) does it produce for 500 k) of heat transfer into the engine? kJ

What is the ideal efficiency of an engine that runs at 3500 K when the surrounding air is 250 K?  The chapters and topics based on these questions come from these concepts. (Phase Changes Thermodynamics.)

(a)On a winter day, a certain house loses 5.33 10 ✕8J of heat to the outside. What is the total change in entropy of the universe due to this heat transfer alone, assuming an average indoor temperature of 24.0°C and an average outdoor temperature of 5.05°C?(b)This large change in entropy implies a large amount of energy has become unavailable to do work. Where do we find more energy when such energy is lost to us?