Question

A British thermal unit (Btu) is a unit of heat in the British system of units. One Btu is defined as the heat needed to raise 1 lb of water by 1 F∘. The specific heat of water is 1.000 kcal/kg⋅C∘. 1  lb = 4.44822 N 1 F∘ = 59C∘ 1 kcal = 4186 J.

Part A Express 1 Btu in kcal. Express your answer using four significant figures. 1 Btu Btu = nothing   kcal   SubmitRequest Answer Part B Express 1 Btu in joules. Express your answer using four significant figures. 1 Btu Btu = nothing   J   SubmitRequest Answer

Answer 1

One 1 BTU = lb xF

                    =4.4482Nx59°C

                    = 252.44cal

                      =0.252Kcal

1Btu=0.252X4186J

         = 1054.872J

         =1.054 KJ