Temperature and Thermal Energy Quiz

Temperature is a measure of the hotness or coldness of a body.

The SI unit of temperature is Kelvin (K).

Heat is the energy produced by molecular movement, measuring the internal energy of an object.

<p>The two fixed points on the Celsius scale are the melting point of ice and the boiling point of water.</p> Signup and view all the answers

<p>0 degrees Celsius is equal to 273.15 K.</p> Signup and view all the answers

<p>A temperature scale requires two reproducible fixed points and equal divisions between those points.</p> Signup and view all the answers

<p>Heating a liquid causes it to expand, which increases its volume.</p> Signup and view all the answers

<p>The Kelvin scale is based on absolute zero and is always positive, making it universally applicable.</p> Signup and view all the answers

<p>Two objects at the same temperature can hold different amounts of heat depending on their masses and specific heat capacities.</p> Signup and view all the answers

<p>Mercury and alcohol thermometers rely on the principle of liquid expansion as temperature increases.</p> Signup and view all the answers

<p>The thermometric property of a thermistor is that its resistance decreases quickly as temperature rises.</p> Signup and view all the answers

<p>Different thermometers may calibrate their readings based on varying thermometric properties and measurement techniques.</p> Signup and view all the answers

<p>As temperature increases, the volume of gas expands, pushing the plunger out in a sealed syringe.</p> Signup and view all the answers

<p>A constriction above the bulb keeps mercury in place after removal, allowing for an accurate reading.</p> Signup and view all the answers

<p>Mercury expands evenly with temperature changes, providing consistent and accurate measurements.</p> Signup and view all the answers

<p>Thermocouples measure temperature differences between two junctions.</p> Signup and view all the answers

<p>An electromotive force (emf) is produced due to the temperature differences at the junctions of the metals.</p> Signup and view all the answers

<p>A calibration curve plots the thermometric property against temperature using a standard thermometer to ensure accurate readings.</p> Signup and view all the answers

<p>Thermocouples can measure rapidly changing temperatures faster than liquid-in-glass thermometers.</p> Signup and view all the answers

<p>It is assumed that there is a linear relationship between emf and temperature to find the corresponding temperature.</p> Signup and view all the answers

<p>The resistance in a thermistor decreases exponentially with increasing temperature.</p> Signup and view all the answers

<p>As temperature increases, the voltage across the thermistor decreases due to lower resistance.</p> Signup and view all the answers

<p>Glycerol provides better thermal contact, ensuring more accurate temperature readings compared to water.</p> Signup and view all the answers

<p>A digital thermometer offers greater accuracy and easier reading of temperature compared to analog devices.</p> Signup and view all the answers

<p>A calibration curve can be established by measuring the emf at known temperatures and plotting these values.</p> Signup and view all the answers

<p>A thermometric property refers to a physical property that changes with temperature and can be used for temperature measurement.</p> Signup and view all the answers

<p>You would refer to the recorded resistance vs. temperature data or curve to find the temperature corresponding to 420 kΩ.</p> Signup and view all the answers

<p>They are based on different principles and materials, leading to variations in their response to temperature changes.</p> Signup and view all the answers

<p>A stirrer with low heat capacity minimizes its impact on the temperature of the liquid, ensuring accurate measurements.</p> Signup and view all the answers

<p>The resistance was measured using an ohmmeter connected across the thermistor.</p> Signup and view all the answers

<p>Heat refers to the energy transferred due to molecular movement, while temperature measures the average kinetic energy of the molecules in an object.</p> Signup and view all the answers

<p>Two objects can have the same temperature yet differ in heat content due to their varying masses and heat capacities, like a swimming pool and a beaker of water both at 20°C.</p> Signup and view all the answers

<p>Absolute zero is 0 K, the point at which molecular motion is minimal and thermal energy is absent, serving as the zero point on the Kelvin scale.</p> Signup and view all the answers

<p>The fixed points on the Celsius scale are the melting point of ice (0°C) and the boiling point of water (100°C), serving as reference points for temperature measurement.</p> Signup and view all the answers

<p>The Kelvin scale is preferred because it is based on absolute zero and is always positive, which enhances its applicability in calculations involving temperature changes.</p> Signup and view all the answers

<p>As the temperature difference increases, the emf across the thermocouple also increases.</p> Signup and view all the answers

<p>More pressure is needed to keep the gas volume constant as temperature increases.</p> Signup and view all the answers

<p>Infrared thermometers detect infrared radiation without direct contact, making them more hygienic.</p> Signup and view all the answers

<p>Calibrate by measuring known temperature points, such as melting ice (0°C) and boiling water (100°C).</p> Signup and view all the answers

<p>The resistance of a thermistor decreases quickly as temperature increases.</p> Signup and view all the answers

<p>The reference junction is placed in a known temperature (ice water), providing a baseline for measurements.</p> Signup and view all the answers

<p>Different thermometers may show slight variations in temperature readings due to differing thermometric properties.</p> Signup and view all the answers

<p>Thermocouples can measure rapidly changing temperatures faster than liquid-in-glass thermometers due to quicker voltage changes.</p> Signup and view all the answers

<p>Glycerol ensures accurate temperature readings and covers the wire in the experiments.</p> Signup and view all the answers

<p>An assumption of a linear relationship between emf and temperature is made to find the corresponding temperature.</p> Signup and view all the answers

<p>The liquid expands as temperature increases, causing the liquid column to rise in a capillary tube, which provides a visual indication of temperature.</p> Signup and view all the answers

<p>Absolute zero, defined as 0 K or -273.15°C, is the point where all thermal energy is removed and molecular motion ceases.</p> Signup and view all the answers

<p>Heat flows from a hotter object to a colder one when there is a temperature difference, driving the transfer of thermal energy.</p> Signup and view all the answers

<p>They serve as fixed points, with the melting point of ice at 0°C and the boiling point at 100°C, defining the scale intervals.</p> Signup and view all the answers

<p>Heat energy depends on the mass and specific heat capacity of the objects, not just their temperature.</p> Signup and view all the answers

<p>Thermistors rely on resistance changes with temperature, while thermocouples utilize voltage changes generated at junctions of dissimilar metals.</p> Signup and view all the answers

<p>These fixed points create a standard reference for measuring and comparing temperatures accurately.</p> Signup and view all the answers

<p>As the temperature difference increases, the emf generated across the thermocouple also increases.</p> Signup and view all the answers

<p>Thermocouples can measure rapidly changing temperatures faster than liquid-in-glass thermometers because voltage changes occur quicker than liquid volume changes.</p> Signup and view all the answers

<p>The resistance of a thermistor decreases quickly as the temperature rises.</p> Signup and view all the answers

<p>A calibration curve plots the thermometric property against temperature to establish a standard relationship between them.</p> Signup and view all the answers

<p>Different types of thermometers may show slight differences in temperature readings due to variations in how their properties change with temperature.</p> Signup and view all the answers

<p>A clinical thermometer has a constriction above the bulb that keeps the mercury in place after removal.</p> Signup and view all the answers

<p>Infrared thermometers operate by detecting infrared radiation from the eardrum, making them less invasive compared to traditional thermometers that measure liquid expansion.</p> Signup and view all the answers

<p>Maintaining constant pressure while heating gas ensures that its volume can be accurately observed as it expands with temperature.</p> Signup and view all the answers

<p>A linear relationship indicates that there is a predictable and consistent change in resistance with changes in temperature.</p> Signup and view all the answers

<p>It is essential to cover the wire in glycerol to ensure accurate temperature readings.</p> Signup and view all the answers

<p>The resistance of a thermistor decreases exponentially as temperature increases.</p> Signup and view all the answers

<p>You can consult a pre-established calibration curve that relates thermistor resistance to temperature.</p> Signup and view all the answers

<p>Glycerol provides better thermal contact, ensuring more accurate and consistent temperature readings.</p> Signup and view all the answers

<p>It is established by measuring the emf produced at known temperature points and plotting the results.</p> Signup and view all the answers

<p>Different thermometers can yield varying temperature readings due to their inherent properties and calibration methods.</p> Signup and view all the answers