What is the energy change when the temperature of 14.7 grams of solid silver is decreased from 37.7 °C to 20.2 °C? Answer: 59.38 Joules Submit Answer Retry Entire Group 9 more group attempts remaining
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- What is the energy change when the temperature of 14.4 grams of solid graphite is decreased from 35.2 °C to 24.4 °C ?What is the energy change when the temperature of 13.8 grams of solid magnesium is decreased from 39.3 °C to 24.8 °C ? (Specific Heat of Mg =1.017 J/g C) a) 204 J b) -203 J c) 837 J d) -837 JA substance, X, has the following properties. SpecificHeat Capacities Hvap 20. kJ/mol C(s) 3.0 J/g°C Hfus 5.0 kJ/mol C(l) 2.5 J/g°C bp 75°C C(g) 1.0 J/g°C mp -15°C Calculate the energy that must be removed to convert 250. grams of the substance X from a gas at 114°C to a solid -45.1°C. Assume X has a molar mass of 75.0 g/mol.
- Which phase change releases energy (exothermic)? Group of answer choices H2O (s) -> H2O (g) H2O (l) -> H2O (s) H2O (l) -> H2O (g) H2O (s) -> H2O (l)1, Use Example 10.10 to calculate the amount of energy in kJ, required to heat two moles of H2O from 65°C to 115°C? Group of answer choices 88 55 77 66 99 5,What is the name for the following phase change? CO2(s) => CO2(g) Group of answer choices A, vaporization B, sublimation C, freezing D, boiling2. How much energy (heat) is required to convert 26.1 g of H2O(l) at 32.5°C to H2O(g) at 119.2°C? specific heat of ice: 2.09 J/g·°C specific heat of water: 4.184 J/g·°C specific heat of steam: 1.84 J/g·°C ΔHfus = 6.02 kJ/mol ΔHvap = 40.7 kJ/mol Answer = ___________J
- e chatelier's principle S₈(g) + 120₂(g) ↔ 8 SO₃(g) + 808kcals what will happen when... (A) Sulfur trioxide is added? (B) Heat is added? (C) Pressure of oxygen gas is increased?14. How much energy (heat) is required to convert 33.5 g of H2O(l) at 8.7°C to H2O(g) at 129.3°C? specific heat of ice: 2.09 J/g·°C specific heat of water: 4.184 J/g·°C specific heat of steam: 1.84 J/g·°C ΔHfus = 6.02 kJ/mol ΔHvap = 40.7 kJ/mol Answer = ___________kJWhat amount of heat is required to vaporize 153.10 g of ethanol (C₂H₅OH)? (∆Hvap = 43.3 kJ/mol) Answer in kJ
- Using the bond enthalpy data from the table below, estimate the enthalpy of reaction (kJ/mol) for the following reaction: N2 + 3 H2 → 2 NH3. Round answer to the ones place.What would the enthalpy change be if an ice cube with a side of 2 cm is brought from -10.0 C to 23.2 C? (density of ice = 0.971, specific heat = 2.01, delta(Hmelting) = 6.01)The lattice energy of NaF is 904 kJ/mol, and the Na–F distance is 190 pm. An unknown metal oxide crystallizes in the same structure as NaF but with distance of 207 pm. The metal oxide has the formula MO, where M is the unknown metal. Which of the following values most closely approximates the lattice energy of the metal oxide? Question 6 options: a) 256 kJ/mol b) 512 kJ/mol c) 904 kJ/mol d) 1046 kJ/mol e) 4090 kJ/mol