Question

i Which substance is a liquid over the smallest range of temperature?
ii Which two substances are gaseous at -50°C?
...... and.......
iii Which substance has the lowest freezing point?...
iv Which substance is liquid at 2500 °C?........
V A sample of ethanoic acid was found to boil at 121 °C at atmospheric pressure. Use the information in the
table to comment on this result.

Answer 1

Answer:

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Answer 2

ANSWERS TO THE GIVEN QUESTIONS ARE AS FOLLOWS:-

• Mercury is a substance which is a liquid over the smallest range of temperatures. Because Mercury is the only metal which is liquid at normal temperatures.

• Hydrogen and oxygen are two substances that are gaseous at -50°C. Because Oxygen and hydrogen have low melting and boiling points, thus it is in a gas state at room temperature.

• Helium is the substance that has the lowest freezing point. Because under particular pressures, it does not freeze at all, even at temperatures reaching absolute zero.

• Iridium is a substance that is liquid at 2500 °C.

• A sample of ethanoic acid was found to boil at 121 °C at atmospheric pressure which means that the sample of ethanoic acid contains impurities.

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