Some oxygen has a density of $1.75 \mathrm{~kg} / \mathrm{m}^3$ at normal atmospheric pressure. Find its pressure (in $\mathrm{kPa}$ ) when the density is changed to $1.45 \mathrm{~kg} / \mathrm{m}^3$ .

An ideal gas occupies a volume of $5.00 \mathrm{~L}$ at STP. (a)Find its temperature if its volume is halved and its absolute pressure is doubled. (b) Find its temperature if its volume is doubled and its absolute pressure is tripled.

What amount of joules of heat are required to melt $15.0 \mathrm{~kg}$ of ice at $0{\degree} \mathrm{C}$ and to raise the temperature of the melted ice to $75{\degree} \mathrm{C}$ ?

What $\mathrm{Btu}$ of heat are released when $20.0 \mathrm{~lb}$ of water at $80{\degree} \mathrm{F}$ is cooled to $32{\degree} \mathrm{F}$ and then frozen in an ice plant?

Determine the decrease in volume of $2000 \mathrm{~ft}^3$ of alcohol in a railroad tank car if the temperature drops from $75{\degree} \mathrm{F}$ to $54{\degree} \mathrm{F}$.

Determine the increase in volume of $35 \mathrm{~L}$ of acetone heated from $28{\degree} \mathrm{C}$ to $38{\degree} \mathrm{C}$.

A steel pipe has a cross-sectional area of $127.20$ in $^2$ at $25{\degree} \mathrm{F}$. Calculate its crosssectional area when the pipe is heated to $175{\degree} \mathrm{F}$ .

A brass rod $1.020 \mathrm{~m}$ long expands $3.0 \mathrm{~mm}$ when it is heated. Calculate the temperature change.

Calculate the increase in length of a zinc rod $50.0 \mathrm{~m}$ long at $15.0{\degree} \mathrm{C}$ when it is heated to $130.0{\degree} \mathrm{C}$.

A $42.0\mathrm{~lb}$ piece of steel at $670{\degree} \mathrm{F}$ is dropped into $100 \mathrm{~lb}$ of water at $75.0{\degree} \mathrm{F}$. Find the final temperature of the mixture.

By using the relation: $\frac{V}{T}=\frac{V^{\prime}}{T^{\prime}}$ , determine the asked quantity: $V=200 \mathrm{~ft}^3, T^{\prime}=95{\degree} \mathrm{F}, V^{\prime}=250 \mathrm{~ft}^3$, determine $T$.

A block of copper is heated from $20.0{\degree} \mathrm{C}$ to $80.0{\degree} \mathrm{C}$. Determine the heat absorbed by the copper if its mass is $60.0 \mathrm{~g}$ .

Calculate the joules of heat which are absorbed by an electric freezer in lowering the temperature of $1850 \mathrm{~g}$ of water from $80.0{\degree} \mathrm{C}$ to $10.0{\degree} \mathrm{C}$ .

Determine the heat flow in $15 \mathrm{~min}$ through a $0.10-\mathrm{cm}$-thick copper plate with crosssectional area $150 \mathrm{~cm}^2$ if the temperature of the hot side is $990{\degree} \mathrm{C}$ and the temperature of the cool side is $5{\degree} \mathrm{C}$.