sending signals to muscles, causing them to contract, or to glands, causing. them to produce secretions. Neurons, or nerve cells, carry out the functions of the nervous system by. conducting nerve impulses.
Best Answer: Specific Heat is the energy required to raise EACH gram of a material by 1C. This is expressed in J/gC. The temperature change is 82.1C - 30.7C = 51.4C. The Aluminum weighs, not 1g, but 625g. m x c x Î´T = Q 29.5g x 0.45J/g/Â°C x (40 - 25Â°C) Î´T = 199.125 Joules (= 0.199kJ) of heat absorbed. (you can say 0.200kJ) If 8.4kJ was used as in your initial statement, to raise the temp. by 5Â°C, the mass of iron must have been much greater than 29.5g. or, 8.4kJ is an error. 29.5 x 0.45 x 5 = 66.4 kJ.
The water specific heat will remain at 4.184, but the value for the metal will be different. These values are tabulated and lists of selected values are in most textbooks. Example #1: Determine the final temperature when a 25.0 g piece of iron at 85.0 Â°C is placed into 75.0 grams of water at 20.0 Â°C.First some discussion, then the solution. Forgive me if the points seem obvious: a) The colder water will warm up (heat energy flows in to it).xample #2: Determine the final temperature when 10.0 g of aluminum at 130.0 Â°C mixes with 200.0 grams of water at 25.0 Â°C. There is no difference in calculational technique from Example #1. Please note the starting temperature of the metal is above the boiling point of water.