Question

A 20.0g piece of metal with a specific heat

L Thermochemistry 1. Calculate the total change in internal energy. AE of a system when 400 J heat is oplies to expanding O2(g) and the gas does 350 J of work on its surroundings. 2. Calculate the kinetic energy in .colories, and 6.00x10 m/s. of a portice (moss 9.11x109) 3. Calculate AH in kJ for reaction. CO CO given the following thermochemical data: 2CO(g) + 020) ► 2C0z9) AHP:. 566.1 kJ 204 + O2(g) → 2CO) AHP : - 310.5 kJ CO2 10 4. What is the resulting temperature when 35.0 g of water at 75 °C is mixed with 150 g of water at 10°C? (Heat capacity of water = 4.184 J/g.°c) 5. A 20.0 9 piece of a metal with specific heat of 0.080 cal/g °C at 68 °C dropped into 15.0 ml water in a calorimeter at 23 °C. Calculate the final equilibrium temperature of the mixture 6. When 72 g of a metal at 97.0°C is added to 100 g of water at 25.0°C, the final temperatur is 45.5 °C. What is the heat capacity per grams of the metal? (Heat capacity of H2O = 4.184 J/g. °C) 7. The heat capacity of lead is 0.13 J/g.°C. How many joules of heat would be required to raise the temperature of 15.0 g of lead from 22 °C to 38 °C?

Answer 1

B. Density of Ho- log/mL, specific heat of H₂O - 1 call go Here, he at lost by metal at heat gain by water to metal X Cmetal (To - Timetal) + MAOXCAX (8-T ) = 0 » 20.0 x 0.080 XT-688) + 15.0 x 1.0x (T-23°c)=0 ( و/cad) { 1.60 TG - 108-8 + 15.0T - 345 = 16.60TL = 345+108.8 453.8 16.60 oC oc 273373ngi uc » T = 27.30 1910.27