Where is the boiling point on a heating curve?

3. Answer: B Explanation: The plateaus or horizontal lines on the graph represent the transition between states of the sample. The first plateau represents the melting (or transition from solid to liquid) and the second plateau represents boiling (or transition from liquid to gas).

How do you read a heating curve graph?

How can you determine the boiling point of a substance based on its heating curve?

Changes of state occur during plateaus because the temperature is constant. The change of state behavior of all substances can be represented with a heating curve of this type. The melting and boiling points of the substance can be determined by the horizontal lines or plateaus on the curve.

What does a heating curve show?

Heating curves show how the temperature changes as a substance is heated up. … They show how the temperature changes as a substance is cooled down. Just like heating curves, cooling curves have horizontal flat parts where the state changes from gas to liquid, or from liquid to solid.

How do you label a heating curve?

What is the slope line in the heating curve represents?

Temperature (°C) 100 The slopes of the slanted lines represent the specific heat capacity. The sharper the slope, the smaller the specific heat capacity of the substance is. … 0 -25 B energy needed to vaporize 1 gram of a Substance at its boiling point.

How does this heating curve illustrates that the heat of vaporization?

How does this heating curve illustrate that the heat of vaporization is greater than the heat of fusion? the change of the heat of vaporization is higher than that of the heat of fusion.

What happens to the temperature of water while it is boiling?

While the water is boiling, the temperature of the liquid water does not change. The thermal energy is absorbed as latent heat until enough heat is absorbed, and then it turns into a gas.

Which line on the heating curve represents heating the gas phase?

Which line segment represents the heat of vaporization?

So we’d say line seven BD deals with melting or fusion or as a line segment, F H deals vaporization. Remember, that’s where we have phase changes where we go from between solid liquid and gas.

Which line segment of the graph represents boiling?

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Questions Answer Explanations
40 The graph below represents the uniform heating or a substance from the solid to the gas phase. Which line segment of the graph represents boiling? (1) AB (3) CD (2) BC (4) DE 4 the upper plateau is boiling

Where on the heating curve does kinetic energy increase?

In the heating curve shown above, at what point do the molecules have the highest kinetic energy? Explanation: Remember, temperature is a measure of the average kinetic energy. Therefore the kinetic energy will be the highest when the temperature is the highest.

What happens to particles when they are heated?

With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion. … With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly.

How is the heat of vaporization of carbon dioxide different from that of water?

Explanation: Carbon dioxide is not a good comparison to water. Its molar mass is 44.009 g/mol , which is 2.4 times the molar mass of water. Also, at normal atmospheric pressure, carbon dioxide sublimes from the solid state directly to the gaseous state, so it has a heat of sublimation, not a heat of vaporization.

Which is greater the heat of fusion or the heat of vaporization?

Notice that for all substances, the heat of vaporization is substantially higher than the heat of fusion. Much more energy is required to change the state from a liquid to a gas than from a solid to a liquid. This is because of the large separation of the particles in the gas state.

What happens to particles during boiling?

Boiling. If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. … Eventually even particles in the middle of the liquid form bubbles of gas in the liquid. At this point the liquid is boiling and turning to gas.

How would the heating curve for glass be different from the heating curve for water?

The heating curve for glass would be different from the heating curve for water because water has a strange behavior while glass also has a strange behavior but is different because it lacks the repeating crystalline structure of solids like ice, or water. Glass becomes soft and impressionable as temperature increases.

Why does heat energy make substances expand?

When a solid is heated, its atoms vibrate faster about their fixed points. … Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.

What happens to energy during boiling?

When boiling occurs, the more energetic molecules change to a gas, spread out, and form bubbles. … In addition, gas molecules leaving the liquid remove thermal energy from the liquid. Therefore the temperature of the liquid remains constant during boiling.

Why do substances boil at different temperatures?

Different liquids have different boiling points depending on the strength of bonding between the particles and the mass of the particles. The heavier the particles in the liquid, and the stronger the bonding, the higher the boiling point will be.