substance 1 is brittle , substance 2 melts. at 5 ℃ and boils at 150 ℃ , substance 3 has a high melting point of 800 ℃ . what is the state of the substance at room temperature and pressure ? give reason .
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Room temperature is said to be around 25℃
So as substance 1 is brittle => it can be broken into pieces when hit by a hammer so it is solid at room temperature and pressure,
substance 2 melts. at 5 ℃ and boils at 150 ℃
=>it is liquid between temperature 5℃ and 150 ℃ as it will melt above 5℃ and become liquid till it's boiling point
substance 3 has a high melting point of 800 ℃ => it will be solid below 800 ℃
So as substance 1 is brittle => it can be broken into pieces when hit by a hammer so it is solid at room temperature and pressure,
substance 2 melts. at 5 ℃ and boils at 150 ℃
=>it is liquid between temperature 5℃ and 150 ℃ as it will melt above 5℃ and become liquid till it's boiling point
substance 3 has a high melting point of 800 ℃ => it will be solid below 800 ℃
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