Heat and Thermodynamics are important concept in physics whose application can be seen in versed field of science and engineering. Grasping the rudiment is therefore important towards channeling worthwhile potentials into greater dimensions of its application. The worked examples and exercises are designed to make the reader appreciate the beauty and complexities of Heat and Thermodynamics. The topics are carefully selected and arranged sequentially for the dual purpose of teaching and learning. The book is originally targeted for students of tertiary institutions.