20. Heat and Temperature

Specific Heat & Temperature Changes

9.1 - Specific Heat and Phase Changes

<p>You are given a sample of an unknown metal. You weigh the sample and find that its weight is 29.4N. You add 1.25×10<sup>4</sup> J of heat energy to the sample and find that its temperature increases from 52°C to 70°C. What is the specific heat of this unknown metal?</p>

How to calculate temperature changes with specific heat capcity - Real Chemistry

Calorimetry Examples: How to Find Heat and Specific Heat Capacity

<math display="inline"><mrow><mn>11.5</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">kJ</mi></mrow></math> of heat energy are added to a <math display="inline"><mrow><mn>250</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">g</mi></mrow></math> block of copper that is initially at <math display="inline"><mrow><mn>20</mn><mo>&#x00B0;</mo><mi mathvariant="normal" class="MathML-Unit">C</mi></mrow></math>. What is the final temperature of the copper? The specific heat capacity of copper is <math display="inline"><mrow><mn>385</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">J</mi><mo>/</mo><mi mathvariant="normal" class="MathML-Unit">kg</mi><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">K</mi></mrow></math>.

In very cold weather a significant mechanism for heat loss by the human body is energy expended in warming the air taken into the lungs with each breath. (a) On a cold winter day when the temperature is -20°C, what amount of heat is needed to warm to body temperature (37°C) the 0.50 L of air exchanged with each breath? Assume that the specific heat of air is 1020 J/kg K and that 1.0 L of air has mass 1.3 * 10^-3 kg.

Specific Heat, Heat, and Temperature | q=mcΔT

How to calculation specific heat, heat, mass, or temperature change using Q=mCdeltaT

A nail driven into a board increases in temperature. If we assume that 60% of the kinetic energy delivered by a 1.80-kg hammer with a speed of 7.80 m/s is transformed into heat that flows into the nail and does not flow out, what is the temperature increase of an 8.00-g aluminum nail after it is struck ten times?

12.7 Heat and Temperature Change: Specific Heat Capacity

Heat Capacity, Specific Heat, and Calorimetry

While painting the top of an antenna 225 m in height, a worker accidentally lets a 1.00-L water bottle fall from his lunchbox. The bottle lands in some bushes at ground level and does not break. If a quantity of heat equal to the magnitude of the change in mechanical energy of the water goes into the water, what is its increase in temperature?

In an effort to stay awake for an all-night study session, a student makes a cup of coffee by first placing a 200-W electric immersion heater in 0.320 kg of water. (b) How much time is required? Assume that all of the heater’s power goes into heating the water

Heating Cup of Water

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