At what temperature does a liquid becomes a gas? Is water vapor a gas? Calculate the enthalpy change for the process in which 27.5 g of water is converted from liquid at 6.8 degrees Celsius to vapor at 25.0 degrees Celsius. For water, delta H_{vap} = 44.0 kJ/mol at 25.0 degrees Ce...
We all know from experience that a piece of paper that is soaked in water does not burn easily. Wet wood does not work well in a campfire. Why petrol does not catch fire on its own at room temperature? Petrol does not catch fire on its own on room temperature because it does not ...
During the denaturation step, the temperature rises to 95-98 C. i) Why does the reaction solution not evaporate onto the inside of the PCR tube lid? ii) Why does the DNA polymerase not denature/unfold at 95-98 C? A student sets up a PCR and sets the denaturation temperature at 95 de...
The absolute temperature of an object is its temperature on a scale relative to a zero point defined by the Third Law of Thermodynamics. The unit of this scale is the Kelvin unit. A temperature measurement in the Celsius scale can be converted to the absolute temperature by adding 273.15 to ...
What happens to water in a waterspout? What happens when you heat ice that is at -40 degrees Celsius? Why is water vapor not regulated as a greenhouse gas? What happens when you mix sugar and water? Why does water vapor condense at the dew point temperature? How are gas and vapor pre...
This is why the air can feel so much more oppressive and heavy in the summer when the temperature is high and the air is jam packed with moisture. In warm climates, the air is often more humid because heat causes water to evaporate more quickly. This leads to a higher concentration of ...
the temperature in a trunk could get up to 50, 60, 70 degrees Celsius. Slides should be kept at room temperature. Even if the box is unopened, it could behave differently because the chemistry of the slides was changed by the temperature. Because of that, we assign the time of one year...
If the relative humidity is 100 percent, we feel much hotter than the actual temperature indicates because our sweat does not evaporate at all. If the relative humidity is low, we feel cooler than the actual temperature because our sweat evaporates easily; we can also feel extremely dry. ...
a liquid conforms to the shape of the container in which it is held. Although this is similar to a gas, a liquid does not expand to fill up the container like a gas. Examples of liquids at room temperature (about 20 degrees Celsius or 68 degrees Fahrenheit) include water, oil, alcohol...
A function can convert temperatures from Celsius to Fahrenheit. The convertToFahrenheit(celsius) function returns the Fahrenheit equivalent of a Celsius temperature. 4 Event A user clicking a button is an event. In web development, an onClick event triggers when the user clicks a button. 1 Func...