Reference no: EM132553522
In an experiment, dissolving 2.00 grams of NaOH in water results in an energy change of 110.4 kJ. What is the molar enthalpy for the process?
When 15.3 g of sodium nitrate were dissolved in 256 g of water in a calorimeter, the temperature fell from 25.00°C to 21.56°C. What is the enthalpy change for the reaction?
When 21.5 g of KNO3 were dissolved in water in a calorimeter, the temperature fell from 25.00°C to 14.14°C. The heat capacity of the calorimeter & its contents is 682 JI°C. What was the amount of energy involved in the reaction?
When 23.6 g of calcium chloride was dissolved in water in a calorimeter, the temperature rose from 25.0°C to 38.7°C. If the heat capacity of the solution & the calorimeter is 1258 J/°C, what is the enthalpy change of the reaction?
A 2.84 g sample of ethanol was burned completely in a bomb calorimeter (used to measure heat for reactions involving gases). The temperature of the calorimeter rose from 25.0°C to 33.7°C. If the heat capacity of the calorimeter & contents was 9.63 kJ/°C, what is the AH value when 1.00 mol of ethanol is burned? write your answer as a thermochemical equation. The reaction is: C2H5OH (0) + 3 O2(g) → 2 CO2(g) + 3 H2O (2)
A 3.51 g sample of benzene was burned in a bomb calorimeter. The temperature of the calorimeter rose from 25.0°C to 37.2°C. If the heat capacity of the calorimeter & its contents was 12.05 kJ/°C, what is the AH for burning 1.00 mol of benzene? write your answer as a thermochemical equation.
A 6.48 g sample of LiOH was dissolved in water in a calorimeter. The temperature of the calorimeter rose from 25.0°C to 36.7°C. The heat capacity of the calorimeter & its contents is 547 JI°C. What is the AH for the solution process if 3.50 mol was dissolved?
Calculate the enthalpy change when 500 g of steam at 100°C condenses & cools to 25.0°C
Calculate the amount of heat needed to change 0.20 kg of ice at -10.0°C to water at 20.0°C.
Calculate the amount of heat needed to convert 0.100 kg of ice at -5.00°C to steam at 110.0°C.