{
  "id": "588e9fde-941c-5262-84ea-78c7a44ebd4f",
  "slug": "r1-1-measuring-enthalpy-changes",
  "title": "R1.1 Measuring enthalpy changes",
  "course": "IB Chemistry",
  "level": "SL",
  "syllabusCode": "R1.1",
  "questionCount": 14,
  "page": "https://splycr.com/ib-chemistry/r1-1-measuring-enthalpy-changes",
  "data": "https://splycr.com/library/r1-1-measuring-enthalpy-changes.json",
  "play": "https://splycr.com/?set=588e9fde-941c-5262-84ea-78c7a44ebd4f",
  "section": {
    "name": "Reactivity 1: What drives chemical reactions?",
    "page": "https://splycr.com/ib-chemistry/what-drives-chemical-reactions"
  },
  "source": {
    "name": "Biology by Bradford",
    "href": "https://www.biologybybradford.com",
    "note": "Written for the splycr library by Biology by Bradford."
  },
  "questions": [
    {
      "number": 1,
      "question": "Reaction that transfers heat to the surroundings?",
      "answer": "Exothermic",
      "wrongOptions": [
        "Endothermic",
        "Isothermal",
        "Adiabatic"
      ]
    },
    {
      "number": 2,
      "question": "Energetic classification of photosynthesis?",
      "answer": "Endothermic",
      "wrongOptions": [
        "Exothermic",
        "Isothermal",
        "Isobaric"
      ]
    },
    {
      "number": 3,
      "question": "Sign of ΔH for a reaction that absorbs heat from the surroundings?",
      "answer": "Positive",
      "wrongOptions": [
        "Negative",
        "Zero",
        "Variable"
      ]
    },
    {
      "number": 4,
      "question": "During an endothermic reaction in solution, the temperature of the solution…?",
      "answer": "Decreases",
      "wrongOptions": [
        "Increases",
        "Stays constant",
        "Fluctuates"
      ]
    },
    {
      "number": 5,
      "question": "Standard pressure for thermodynamic data?",
      "answer": "100 kPa",
      "wrongOptions": [
        "1 kPa",
        "10 kPa",
        "1000 kPa"
      ]
    },
    {
      "number": 6,
      "question": "Temperature usually quoted for standard enthalpy changes?",
      "answer": "298 K",
      "wrongOptions": [
        "273 K",
        "373 K",
        "0 K"
      ]
    },
    {
      "number": 7,
      "question": "On the energy profile of an exothermic reaction, the products lie…?",
      "answer": "Below the reactants",
      "wrongOptions": [
        "Above the reactants",
        "Level with the reactants",
        "At the peak"
      ]
    },
    {
      "number": 8,
      "question": "Minimum energy colliding particles need to react?",
      "answer": "Activation energy",
      "wrongOptions": [
        "Enthalpy change",
        "Lattice enthalpy",
        "Bond enthalpy"
      ]
    },
    {
      "number": 9,
      "question": "Equation for the heat absorbed by water in calorimetry?",
      "answer": "q = mcΔT",
      "wrongOptions": [
        "q = mΔT/c",
        "q = cΔT/m",
        "q = mc/ΔT"
      ]
    },
    {
      "number": 10,
      "question": "Specific heat capacity of water?",
      "answer": "4.18 J g⁻¹ K⁻¹",
      "wrongOptions": [
        "4.18 kJ g⁻¹ K⁻¹",
        "41.8 J g⁻¹ K⁻¹",
        "0.418 J g⁻¹ K⁻¹"
      ]
    },
    {
      "number": 11,
      "question": "Heat to warm 100 g of water by 10 K (c = 4.18 J g⁻¹ K⁻¹)?",
      "answer": "4.18 kJ",
      "wrongOptions": [
        "41.8 kJ",
        "0.418 kJ",
        "418 kJ"
      ]
    },
    {
      "number": 12,
      "question": "50 cm³ of aqueous solution warms by 2.0 K; heat released (c = 4.18 J g⁻¹ K⁻¹)?",
      "answer": "418 J",
      "wrongOptions": [
        "209 J",
        "836 J",
        "4180 J"
      ]
    },
    {
      "number": 13,
      "question": "ΔH when 0.10 mol of reactant releases 5.0 kJ of heat?",
      "answer": "−50 kJ mol⁻¹",
      "wrongOptions": [
        "+50 kJ mol⁻¹",
        "−0.50 kJ mol⁻¹",
        "−5.0 kJ mol⁻¹"
      ]
    },
    {
      "number": 14,
      "question": "Main source of error making measured ΔH less exothermic in simple calorimetry?",
      "answer": "Heat loss",
      "wrongOptions": [
        "Solvent evaporation",
        "Reagent impurity",
        "Excess reactant"
      ]
    }
  ]
}