Final Exam 4 Question Preview (ID: 19335)


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What sign does ∆H have in exothermic reactions?
a) negative
b) positive
c) neutral
d) none of these

What is the definition of enthalpy?
a) The quantity of heat required to raise the temperature of a sample of a substance one degree Celsius
b) Energy that transfers from one object to another because of a temperature difference between them
c) Change in heat content for a reaction at constant pressure
d) The unavailability of a system’s thermal energy to do work

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) 560 °C
b) 71.4 °C
c) 4.5 °C
d) 5.6 x 10-6 °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?
a) 5000 calories
b) 5 calories
c) 470 calories
d) 30,000 calories

In ______, an atom gives off a helium atom without the electrons.
a) alpha decay
b) beta emission
c) gamma emission
d)

In ______, an atom breaks apart a neutron into a proton and electron; the electron is released..
a) alpha decay
b) beta emission
c) gamma emission
d)

_____ is the easiest radiation to stop; it can be stopped by a single sheet of paper.
a) alpha radiation
b) beta radiation
c) gamma radiation
d)

______ is one of the harder radiations to stop; it can go through your body, but is stopped by lead or steel plates.
a) alpha radiation
b) beta radiation
c) gamma radiation
d)

To balance a nuclear equation for beta decay, you should _________ the atomic number by the atomic number of the beta particle.
a) minus
b) plus
c) divide
d) multiply

Finish the equation for the following beta decay reaction: 1 3H Æ ? + -10e
a) 2 3He
b) 3 3Li
c) 5 3B
d) none of these

If a solution can hold more solute (it isn’t full yet) it is ___.
a) Unsaturated
b) saturated
c) supersaturated
d)

If a solution cannot hold any more solute (it is full) it is ___.
a) unsaturated
b) saturated
c) supersaturated
d)

If a solution holds more solute than it should be able (its over full) it is ___.
a) unsaturated
b) saturated
c) supersaturated
d)

A solution is saturated at 25g per 100g of H2O. If 25 grams is dissolved in 100g of H2O, it is ___.
a) unsaturated
b) saturated
c) supersaturated
d)

A solution is saturated at 25g per 100g of H2O and holds 22 grams in 100g of H2O. It is ___.
a) unsaturated
b) saturated
c) supersaturated
d)

A solution is saturated at 25g per 100g of H2O and holds 31 grams in 100g of H2O. It is ___.
a) unsaturated
b) saturated
c) supersaturated
d)

is the type of polyprotic acid that can donate two protons per molecule
a) Polyprotic Acid
b) Brønsted-Lowry Acid
c) Brønsted-Lowry Base
d) Diprotic Acid

is a molecule or ion that is a proton acceptor.
a) Polyprotic Acid
b) Brønsted-Lowry Acid
c) Brønsted-Lowry Base
d) Diprotic Acid

is a molecule or ion that is a proton donor.
a) Polyprotic Acid
b) Brønsted-Lowry Acid
c) Brønsted-Lowry Base
d) Diprotic Acid

an acid that can donate more than one proton per molecule.
a) Polyprotic Acid
b) Brønsted-Lowry Acid
c) Brønsted-Lowry Base
d) Diprotic Acid

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