R temperature continuing to rise after the heater is switched off B1\n- States a corresponding method to reduce the identified error, e.g. wrap the block in insulation (such as felt or bubble wrap) OR add a few drops of oil or water to the thermometer hole OR measure the maximum temperature reached after the heater is turned off B1","marks":2,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"reduce_heat_loss","label":"Reduce heat loss","steps":[{"type":"text","order":0,"title":"Identify the error","content":"The heater transfers energy to the aluminium block, but some thermal energy is also transferred to the surroundings instead of heating the block.\n\nState this as a significant source of error: **thermal energy is lost to the surroundings**. This earns **B1**.","highlights":[{"text":"Identify one significant source of error in this investigation","location":"specification"}]},{"type":"text","order":1,"title":"Match a reduction","content":"Reduce this loss by **wrapping the block in insulation**, for example felt or bubble wrap. Insulation reduces the energy transferred from the hot block to the surroundings.\n\nThis matching improvement earns the second **B1**.","highlights":[{"text":"state how this error can be reduced","location":"specification"}]}]}],"generatedAt":"2026-07-21T17:50:02.350Z","modelVersion":"gpt-5.6-terra+diagrams-1","explanationVersion":"v3"},"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"c5a191b0-1827-40ba-9855-fcb009608eb8","revisionId":"d7c71f3d-c252-4269-9549-648209467964","questionNumber":null,"questionType":"LA","specification":"An engineer is conducting an experiment to determine the specific heat capacity of a liquid engine coolant using an electrical immersion heater inside a copper calorimeter. The experimental value obtained for the specific heat capacity is significantly higher than the actual manufacturer specification.","difficulty":4,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"c32a9be0-4b1b-4792-bf8f-8bde0aae8fcb","label":null,"content":"State **two** distinct improvements the engineer could make to the apparatus or the procedure to obtain a more accurate value.","markscheme":"- Insulate the outer surface of the calorimeter (e.g., using a foam jacket or bubble wrap) to reduce heat transfer to the surroundings. B1\n- Place a lid on the calorimeter to prevent heat loss to the atmosphere via evaporation or convection. B1\n- Stir the liquid continuously throughout the experiment to ensure a uniform temperature distribution before taking thermometer readings. B1\n- Account for the heat energy absorbed by the copper calorimeter (and/or the heater and thermometer) in the final calculation. B1","marks":2,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"improve_measurement","label":"Improve the measurement","steps":[{"type":"text","order":1,"title":"Explain the high value","content":"The calculation uses $c = E \\div (m\\Delta T)$. For the same mass of coolant, if some supplied energy heats the calorimeter or is lost to the surroundings, $\\Delta T$ is too small, so the calculated specific heat capacity is too high.","highlights":[{"text":"The experimental value obtained for the specific heat capacity is significantly higher than the actual manufacturer specification.","location":"specification"}]},{"type":"text","order":2,"title":"State two improvements","content":"Choose **two** distinct improvements.\n\n- Insulate the outer surface of the calorimeter, for example with foam or bubble wrap. **B1:** this reduces heat transfer to the surroundings.\n- Put a lid on the calorimeter. **B1:** this reduces heat loss by evaporation and convection.\n\nOther acceptable answers: stir the liquid continuously so its temperature is uniform before reading the thermometer; or include the energy absorbed by the copper calorimeter, heater and thermometer in the calculation.","highlights":[{"text":"State **t

Heating, specific heat and latent heat

Question 36

Heating, specific heat and latent heat Questions

Heating, specific heat and latent heat

Question 36

Heating, specific heat and latent heat Questions