A substance found in residual fuels which tends to cause exhaust valve corrosion and grooving, is()
The vapor pressure of a substance().
The heat required to change a substance from a solid to a liquid while at its freezing temperature, is known as the latent heat of ().
The sum of the sensible heat and the latent heat of any substance is known as ().
Which condition is necessary for a substance to burn?()
The sum of the sensible heat and the latent heat of any substance is known as ().
What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?()
A substance found in residual fuels which tends to cause exhaust valve corrosion and grooving, is()
What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?()
轻组腐殖物质 humic substance in light fraction