When the products of a reaction are hotter than the reactants: The reaction is exothermic. The reaction is endothermic. The reactants lost internal energy. The change in enthalpy is positive.

Is sliver or aluminum most often used in magnets

Chemistry problem:Osmosis?

What is the difference between mass and weight

When a sample of a gas was placed in a sealed container with a volume of 3.35L and heated to 105°C, the gas vaporized and the resulting pressure inside the container was 170.0kPa. How many moles of the gas was president?

Vhat is the molarity of an Nal solution that contains 7.0 g of Nal in 23.0 mL of solution?

How do you balance __Mg + __HCl - - > __MgCl2 + ___ H2

How many grams of methane, CH4 are produced from the complete reaction of 5.15 moles of carbon monoxide, CO

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?