Water is heated isothermally in a piston/cylinder arrangement at a temperature of 200 deg C from the saturated liquid condition until the specific volume is 0.20596 m3/kg. The pressure at state 1 is

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.