// Numbas version: exam_results_page_options
{"name": "Specific Heat Capacity: Final Temperature", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Specific Heat Capacity: Final Temperature", "tags": [], "metadata": {"description": "<p>Use the specific heat capacity of an object and the heat released to calculate the final temperature.</p><p>Custom marking used to allow for partial credit for common errors (mal rules)</p><p><br></p><p>Thermochemistry Revision Sheet Q7</p>", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "<p style=\"text-align: left;\">If {mass_string} of&nbsp;{Mat_string} at&nbsp;{start_temp}&nbsp;<span class=\"_Tgc\">&deg;</span>C releases&nbsp;{heat}&nbsp;J of heat, calculate the final temperature of the&nbsp;{Mat_string}.</p>\n<p style=\"text-align: left;\">(Specific heat capacity of&nbsp;{Mat_string}&nbsp;{SHC_string} J g<sup>-1</sup>&nbsp;&nbsp;<sup>-1</sup>)</p>\n<p></p>", "advice": "<p>q = m * s.h.c&nbsp;&nbsp;* <span class=\"st\" data-hveid=\"41\">&Delta;</span>T</p>\n<p>Find the heat energy by substituting in&nbsp;$\\var{heat}=\\var{mass_string}*\\var{SHC_string}*(\\var{Start_temp} - final temperature)$</p>\n<p>Transpose this to isolate the final temperature</p>\n<p>Does your answer seem reasonable?</p>\n<p></p>\n<p></p>", "rulesets": {}, "extensions": [], "variables": {"Mat_string": {"name": "Mat_string", "group": "Ungrouped variables", "definition": "Material[materialnum]", "description": "", "templateType": "anything"}, "SpecificHeat": {"name": "SpecificHeat", "group": "Ungrouped variables", "definition": "[4.184,0.235,0.897]", "description": "", "templateType": "anything"}, "Material": {"name": "Material", "group": "Ungrouped variables", "definition": "['Water','Silver','Aluminium']", "description": "", "templateType": "anything"}, "Start_temp": {"name": "Start_temp", "group": "Ungrouped variables", "definition": "random(30 .. 40#1)", "description": "", "templateType": "randrange"}, "mal2": {"name": "mal2", "group": "Mal rule answers", "definition": "(Heat)/((Mass)*(SpecificHeat[materialnum])*Start_temp)", "description": "<p>Student error gainig partial credit.</p>\n<p>Student transposes incorrectly.</p>", "templateType": "anything"}, "mal1": {"name": "mal1", "group": "Mal rule answers", "definition": "((Heat - (Mass)*(SpecificHeat[materialnum])*(start_temp)))", "description": "<p>Student error deserving partial credit.</p>\n<p>Student multiplied incorrectly into deltaT therefore oversimplifying</p>", "templateType": "anything"}, "mass_string": {"name": "mass_string", "group": "mass", "definition": "mass+'g'", "description": "", "templateType": "anything"}, "Mass": {"name": "Mass", "group": "mass", "definition": "random(5.00..30.00#1)", "description": "", "templateType": "anything"}, "SHC_string": {"name": "SHC_string", "group": "Ungrouped variables", "definition": "SpecificHeat[materialnum]", "description": "", "templateType": "anything"}, "materialnum": {"name": "materialnum", "group": "Ungrouped variables", "definition": "random(0 .. 2#1)", "description": "", "templateType": "randrange"}, "Heat": {"name": "Heat", "group": "Ungrouped variables", "definition": "random(21.00..23.00#0.1)", "description": "<p>Heat energy lost in J</p>", "templateType": "anything"}, "HeatkJ": {"name": "HeatkJ", "group": "Ungrouped variables", "definition": "Heat/1000", "description": "", "templateType": "anything"}, "End_temp": {"name": "End_temp", "group": "Ungrouped variables", "definition": "((Heat - (Mass)*(SpecificHeat[materialnum])*(start_temp)))/((-1)*(Mass)*(SpecificHeat[materialnum]))", "description": "<p>This is the final answer</p>", "templateType": "anything"}}, "variablesTest": {"condition": "", "maxRuns": "1000"}, "ungrouped_variables": ["SpecificHeat", "Material", "materialnum", "Mat_string", "Heat", "SHC_string", "Start_temp", "End_temp", "HeatkJ"], "variable_groups": [{"name": "mass", "variables": ["Mass", "mass_string"]}, {"name": "Mal rule answers", "variables": ["mal1", "mal2"]}], "functions": {"": {"parameters": [], "type": "number", "language": "jme", "definition": ""}}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "numberentry", "useCustomName": false, "customName": "", "marks": "10", "showCorrectAnswer": true, "showFeedbackIcon": true, "scripts": {}, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "adaptiveMarkingPenalty": 0, "customMarkingAlgorithm": "mark:\n   apply(validNumber);\n    if(isFraction,\n        apply(cancelled)\n    ,\n        apply(correctPrecision)\n    );\n    switch(\n    studentNumber=precround(End_temp,studentPrecision),set_credit(1,\"Correct Answer. Well Done!!\"),\n    studentNumber=precround(mal1, studentPrecision),set_credit(0.4,\"On the right track but not there yet. Have another look at your deltaT. Did you correctly multiply in?\"),\n    studentNumber=precround(mal2, studentPrecision),set_credit(0.2,\"On the right track but not there yet. Have another look at how you are isolating the final temperature.\"),\n    studentNumber=precround((-1)*mal2, studentPrecision),set_credit(0.2,\"On the right track but not there yet. Have another look at how you are isolating the final temperature.\"),\n  set_credit(0,\"Incorrect\") \n    )", "extendBaseMarkingAlgorithm": true, "unitTests": [], "minValue": "End_temp", "maxValue": "End_temp", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "precisionType": "dp", "precision": "2", "precisionPartialCredit": 0, "precisionMessage": "You have not given your answer to the correct precision.", "strictPrecision": false, "showPrecisionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}], "contributors": [{"name": "Deirdre Casey", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/681/"}, {"name": "Tom Stallard", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/841/"}]}]}], "contributors": [{"name": "Deirdre Casey", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/681/"}, {"name": "Tom Stallard", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/841/"}]}