One mole of an ideal gas first undergoes an isothermal expansion at a temperature ?1= 800 K to 2 times its original volume. The temperature is then reduced in an isochoric process to ?2 = 300 K. An isothermal compression takes the gas back to its original volume and a final isochoric process returns the system to temperature ?1. How much heat is exchanged between the system and its surroundings?

A piece of metal weighing 8.00 g  at a temperature of 46.0 oCo was placed in a calorimeter in 38.10 mL  of water at 24.3 oC. The final equilibrium temperature was found to be 25.7 oC . What is the specific heat of the metal?

thermometer. A sample of aluminum, which has a specific heat capacity of 0.897 J'g.°C', is put into a calorimeter (see sketch at right) that contains 100.0 g of water. The aluminum sample starts off at 92.4 °C and the temperature of the water starts off at 15.0 °C. When the temperature of the water stops changing it's 23.2 °C. The pressure remains constant at 1 atm. insulated container water sample Calculate the mass of the aluminum sample. Be sure your answer is rounded to 2 significant digits. a calorimeter Submit Assignment Continue 62021 McGraw Hill LLC. Al Rights Reserved. Terms of UseI Privacy Center Accessibility

Measurements show that the energy of a mixture of gaseous reactants decreases by 175. kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that 79. kJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture during the reaction. Be sure your answer has the correct number of significant digits. x10 exothermic Is the reaction exothermic or endothermic? endothermic