4. When 1.50 g of Ba(s) is added to 100.00 g of water in a container open to the atmosphere, the reaction shown below occurs and the temperature of the resulting solution rises from 22.00°C to 33.10°C. If the specific heat of the solution is 4.18 JF(g - "Q), calculate AH for the reaction, as written. Ba (s) + 2 H,O (1) → Ba(OH), (aq) + H; (g) AH=?

A gaseous fuel mixture contains 24.2% methane (CH4), 40.5% ethane (C₂H6) and the rest propane (C3H8) by volume. When the fuel mixture contained in a 1.56 L tank, stored at 754 mmHg and 298 K, undergoes complete combustion, how much heat is emitted? (Assume that the water produced by the combustion is in the gaseous state.) Express your answer with the appropriate units. μÅ Value Submit Units Request Answer ?

[References] In a coffee-cup calorimeter, 100.0 mL of 1.3 M NaOH and 100.0 mL of 1.3 M HCl are mixed. Both solutions were originally at 24.3°C. After the reaction, the final temperature is 33.0°C. Assuming that all the solutions have a density of 1.0 g/cm³ and a specific heat capacity of 4.18 J/°C-g. calculate the enthalpy change for the neutralization of HCl by NaOH. Assume that no heat is lost to the surroundings or to the calorimeter. kJ/mol AH = Submit Answer Try Another Version 1 item attempt remaining 4 C C A 6 T

8. A 1.107-g sample of benzoic acid (HC;H;O2) is burned in an excess of O:(g) in a bomb calorimeter, which is immersed in water. The reaction produces heat that causes the temperature of the water and bomb to increase from 24.96 to 29.20°C. (a) If the heat capacity of the calorimeter is 6.90 kJ/ºC, how many kilojoules of heat are produced by the combustion of 1.107 g of benzoic acid? (b) Calculate the heat of combustion per gram of benzoic acid and the molar enthalpy of combustion of benzoic acid.