1. A substance will boil at lower temperature if: A. The volume of the system is...

1. A substance will boil at lower temperature if:

A. The volume of the system is deceased.

B. The presence of the system is deceased.

C. An additional amount of the substance is added.

D. The substance is dissolved in water.

E. A and B

2. Food will cook quickly for canning when salt is added to the water. True or False

Solutions

Expert Solution

Q1.
Correct answer: B,
Explanation: if the pressure of a system is decreased then boiling point decreases becuase its vapor pressure easily overcome the external lower pressure. For example, at the height such as mountains, cooking food is difficult because due to lower pressure at the height, the boiling point of the water decreases.
therefore, if external pressure is decreased then the boiling point will increase.
options C, D are wrong because addition of extra substance cause an increase in its boiling point while volume does not affect boiling point.

Q2. Answer: True,

Explanation: if salt is added to the water then boiling point of water increases which makes water to absorb more heat in order to boil. If water is absorbing more heat, food grains will also get more heat and hence cooking will be done quickly.

queen_honey_blossom answered 2 years ago

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