2. Water is heated in a calorimeter cup to determine the electrical heat equivalent (EHE). A graph of electrical energy

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2 Water Is Heated In A Calorimeter Cup To Determine The Electrical Heat Equivalent Ehe A Graph Of Electrical Energy 1 (35.1 KiB) Viewed 41 times

2. Water is heated in a calorimeter cup to determine the electrical heat equivalent (EHE). A graph of electrical energy (E) versus change in temperature (AT) is then obtained as shown in Figure 1. The mass of the inner aluminum cup is 26 g and the mass of the water is 160g. The specific heats are given as: Coup-0.215 cal/g °C and Cwater Ical/g C 30000 y = 651.43x + 216.87 20000 R² = 0.9945 10000 0 0 10 20 30 40 AT (°C) Figure 1: Electrical energy (E) versus change in temperature (AT) plot a) Establish a relationship between the slope of E (J) Vs ATCC) plot and electrical heat equivalent (E Make clear arguments. (10) b) Find out the value of EHE from this measurement. (10) c) How many Joules of electrical energy is equivalent to 40 calorie of heat energy? (5) Danistanan E(S)