how does thermo emf vary with the temperature?write 2 applications of thermoelectricity?

dear neet 
kindly ask one question at each tag . 
thermochemistry have application in major of the part where heat consumption occurs , like in the car engines , 
in each and every chemical reaction which involves liberation of heat , 
and inside human body also , where the protein , carbohydrate , will convert into simple substances . etc 
HOPE IT CLEARS 
regards