Heating curve - CHEMISTRY COMMUNITY
2022年1月22日 · Re: Heating curve Post by 005502505 » Sat Jan 29, 2022 6:41 pm Hello; the line in a phase change diagram remains flat during a change of state b/c the heat energy is going into breaking the bonds to result in a phase change (ex: solid -> liquid).
Heating Curve - CHEMISTRY COMMUNITY - University of …
2020年2月3日 · The flat lines on a heating curve represent the deltaH(fusion) or the deltaH(vaporization) depending on where the horizontal line is. The increasing diagonal lines are representing the q=mcAT as we are heating the substance with a certain heat capacity.
Heating Curves vs. Cooling Curves - CHEMISTRY COMMUNITY
2016年1月16日 · This becomes a heating curve diagram. Vice versa, if we wanted to see the phase changes of water becoming ice, the temperature would start at a higher point and we would see the curve decrease over time. This would be your cooling curve diagram.
Heating Curve - CHEMISTRY COMMUNITY - University of …
2024年1月25日 · If we recalled the graph of the heating curve that was shown in lecture, it showed the corresponding amount of energy needed in kJ to change the phase of water from solid, to liquid, to gas. The amount of energy needed to go from solid to liquid was around 5-6 kJ whereas the amount of energy needed to vaporize water was around 40 kJ.
Steepness of Heating Curve? - CHEMISTRY COMMUNITY
2016年2月1日 · The steeper the slope of a heating curve, the lower the heat capacity. It is simply dependent on the value of the heat capacity which is defined as the amount of heat needed to raise the system's temperature by one degree.
Slope of heating curve - CHEMISTRY COMMUNITY - University of …
2019年2月13日 · Re: Slope of heating curve Post by Anna O 2C » Mon Feb 18, 2019 2:39 am It is a shallower slope because it is a slower process to reaching the next phase change whereas for low heat capacity, it takes less energy and heat and thus has a steep slope because it reaches the next phase easier.
Heat Curves - CHEMISTRY COMMUNITY
2024年2月1日 · The straight lines (constant temp-value) on heating curves signify the point at which a substance is undergoing a phase change. Despite heat being added or taken from a system, the temperature remains stagnant while the substance undergoes the phase change (i.e. freezing/melting).
Heating Curve - CHEMISTRY COMMUNITY - University of …
2024年1月26日 · The plateaus for the heating curve happen because heat is used to break the bonds to transition from phase to phase. The length of the plateau will depend on the amount of energy that is required to overcome the forces that hold …
How to draw a heating curve? - CHEMISTRY COMMUNITY
2016年1月27日 · How to draw a heating curve? Post by stacey » Wed Jan 27, 2016 7:13 am On the workbook, no.5 on the quiz preparation, it asks us to draw a heating curve based on the enthalpy of fusion, enthalpy of vaporisation, and the heat capacity for solid, liquid and gas phases.
PE and KE on a heating curve - CHEMISTRY COMMUNITY
2024年2月12日 · On a heating curve, the slanted parts correspond with a change in kinetic energy, while the flat parts where the phase change occurs corresponds with a change in potential energy. Why is this so? I thought that while the substance is changing phases, the kinetic energy of the particles would change as well since more particles are being changed ...