Chemistry! 5 questions
1) Which of the following is a exothermic reaction?
- dissolving ammonium nitrate in water to cool the water.
-condensation
-dissolving sugar in water
-melting ice
2) Which of the following parameters is measured directly in a calorimeter lab?
- temperature
- pressure
- kinetic energy
- heat of fusion
3) what type of substance would be best for use in a heating system?
- a liquid with a high specific heat
- a gas with a low specific heat
- a solid with a high specific heat
- a liquid with a low specific heat
4) which of the following is a an example of an endothermic reaction?
-Melting ice cubes
-Hot pack or hand warmer
-Cooking food
5) which of the following is likely to be true about an equation in which there evaporation?
- the enthalpy is zero
- the enthalpy is positive
- the enthalpy is negative?
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