When 1.00 mole of NH4NO3 dissolves in water, the enthalpy change is ΔH = + 25.7 kJ. What is the enthalpy change if 17.5 grams of NH4NO3 are dissolved in water?
When 1.00 mole of NH4NO3 dissolves in water, the enthalpy change is ΔH = + 25.7...
Compound Δ Hrxn (kJ/mol) NH4NO3 + 25.7 KCl + 17.2 NaOH -44.5 KOH -57.6 You are given 6.9 grams of an unknown salt. You dissolve it in 56.5 mL of water. As the salt dissolves, the temperature of the solution changes from an initial temperature of 28.9°C to a final temperature of 22.9°C. Based on the chart of ΔH values and the temperature change, you can determine which salt you have. What is the temperature change? Δ T = o C...
Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves, lowering the temperature because of the endothermic reaction NH4NO3(s)+H2O(l)→NH4NO3(aq) ΔH= +25.7 kJ. What is the final temperature in a squeezed cold pack that contains 43.5 g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/(g⋅∘C) for the solution, an initial temperature of 29.0 ∘C, and no heat...
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in water. A 10.0 g sample of an ionic compound with a molar mass of 190.0 g/mol was added to a sample of deionized water to produce 60.0 grams of solution. After stirring and dissolving the solid, the temperature was found to change from 25.00 °C to 23.86 °C. Calculate the enthalpy of solution, AH coln, per mole...
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in water. A 10.0 g sample of an ionic compound with a molar mass of 110.0 g/mol was added to a sample of deionized water to produce 60.0 grams of solution. After stirring and dissolving the solid, the temperature was found to change from 25.00 C to 23.83 C. Calculate the enthalpy of solution, AH soln per mole...
Enthalpy from a reaction What is the change in temperature when 3.00 grams of calcium chloride is dissolved in 100 mL of water? 5.19 loc Given the change in the temperature from adding 3.00 grams of calcium chloride to 100.00 mL of water, calculate the enthalpy of solution for calcium chloride in units of kJ/mol. kJ/mol
Part A Calculate the enthalpy change, ΔH, for the process in which 42.4 g of water is converted from liquid at 15.3 ∘C to vapor at 25.0 ∘C . For water, ΔHvap = 44.0 kJ/mol at 25.0 ∘C and Cs = 4.18 J/(g⋅∘C) for H2O(l). How many grams of ice at -16.2 ∘C can be completely converted to liquid at 25.5 ∘C if the available heat for this process is 4.77×103 kJ ? For ice, use a specific heat of...
The enthalpy of fusion of benzene (C6Hộis ДН%,-10.59 kJ/mole. What is the entro change (AS) when 106 grams benzene melts at 5.45°C?
find enthalpy change 3. When 2.617 g of AX (s) dissolves in 141.2 g of water in a coffee-cup calorimeter the temperature rises from 24.5 °C to 36.5 °C. Calculate the enthalpy change (in kJ/mol) for the solution process. AX(s) - A+ (aq) + X(aq) Assumptions for this calculation: The specific heat of the solution is the same as that of pure water (4.18 J/gK) The density of water = 1.000 g/mL. The liquid's final volume is not changed by...
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in water. A 10.0 g sample of an ionic compound with a molar mass of 175.0 g/mol was added to a sample of deionized water to produce 60.0 grams of solution. After stirring and dissolving the solid, the temperature was found to change from 25.00 °C to 23.63 "C. Calculate the enthalpy of solution, AH gola, per mole...
A scientist measures the standard enthalpy change for the following reaction to be -133.1 kJ: NH4NO3 (aq) ---> N2O (g) + 2 H2O (l) based on this value and the standard enthalpies if formation for the other substances, the standard enthalpy of formation of NH4NO3 (aq) is what? (kJ/mol)