Clayton Greene

Chemistry

11 August, 23:17

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?