What sign does ∆H have in exothermic reactions?

What is the definition of enthalpy?

A 50-gram piece of silver is dropped into a container of water. As it cools, the silver gives off 200 calories of heat. What is the silver’s temperature change? (The specific heat capacity of silver is 0.056 cal/g°C).

A piece of sugar free gum is burned in a bomb calorimeter containing 500 g of water. The temperature of the water increases from 25 ºC to 35 ºC. How many calories did the peanut have?

In ______, an atom gives off a helium atom without the electrons.

In ______, an atom breaks apart a neutron into a proton and electron; the electron is released..

_____ is the easiest radiation to stop; it can be stopped by a single sheet of paper.

______ is one of the harder radiations to stop; it can go through your body, but is stopped by lead or steel plates.

To balance a nuclear equation for beta decay, you should _________ the atomic number by the atomic number of the beta particle.

Finish the equation for the following beta decay reaction: 1 3H Æ ? + -10e

If a solution can hold more solute (it isn’t full yet) it is ___.

If a solution cannot hold any more solute (it is full) it is ___.

If a solution holds more solute than it should be able (its over full) it is ___.

A solution is saturated at 25g per 100g of H2O. If 25 grams is dissolved in 100g of H2O, it is ___.

A solution is saturated at 25g per 100g of H2O and holds 22 grams in 100g of H2O. It is ___.

A solution is saturated at 25g per 100g of H2O and holds 31 grams in 100g of H2O. It is ___.

is the type of polyprotic acid that can donate two protons per molecule

is a molecule or ion that is a proton acceptor.

is a molecule or ion that is a proton donor.

an acid that can donate more than one proton per molecule.

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