Physical Chemistry - Thermochemistry and Thermodynamics

1

A sample of an ideal gas is initially at a volume of $3.5 \textup{ L}$ . The gas expands to a volume of $7.0 \textup{ m}^3$ when $2.0 \textup{ J}$ of heat is applied to the system against a constant external pressure of $0.50 \textup{ Pa}$ . Calculate the change in internal energy for this gas.

$1.0\textup{ Pa}\cdot \textup{m}^{3}=1.0 \textup{ J}$

2

A sample of an ideal gas is initially at a volume of $3.5 \textup{ L}$ . The gas expands to a volume of $7.0 \textup{ m}^3$ when $2.0 \textup{ J}$ of heat is applied to the system against a constant external pressure of $0.50 \textup{ Pa}$ . Calculate the change in internal energy for this gas.

$1.0\textup{ Pa}\cdot \textup{m}^{3}=1.0 \textup{ J}$

3

A sample of an ideal gas is initially at a volume of $3.5 \textup{ L}$ . The gas expands to a volume of $7.0 \textup{ m}^3$ when $2.0 \textup{ J}$ of heat is applied to the system against a constant external pressure of $0.50 \textup{ Pa}$ . Calculate the change in internal energy for this gas.

$1.0\textup{ Pa}\cdot \textup{m}^{3}=1.0 \textup{ J}$

4

In an __________ reaction, the products are more stable than the reactants; in an __________ reaction the reactants are more stable than the products.

5

In an __________ reaction, the products are more stable than the reactants; in an __________ reaction the reactants are more stable than the products.

6

In an __________ reaction, the products are more stable than the reactants; in an __________ reaction the reactants are more stable than the products.

7

In an exergonic reaction, products will have __________ Gibbs free energy and the reaction is __________.

8

At $270 \textup{ K}$ , a $0.1446 \textup{ mol}$ sample of argon gas expands reversibly from a confined space of $2.1 \textup{ m}^3$ to $3.4 \textup{ m}^3$ . Calculate the work done.

9

At $270 \textup{ K}$ , a $0.1446 \textup{ mol}$ sample of argon gas expands reversibly from a confined space of $2.1 \textup{ m}^3$ to $3.4 \textup{ m}^3$ . Calculate the work done.

10

In an exergonic reaction, products will have __________ Gibbs free energy and the reaction is __________.

Thermochemistry and Thermodynamics

Practice Questions