## College Physics (7th Edition)

a). $(1)$ temperature will increase. b). Pressure will become $4$ times.
a). By ideal gas law, we have $P=\frac{NRT}{V}$ b). $P=\frac{NRT}{V}$ If temperature doubles and volume is halved, $P^{'}=\frac{NR(2T)}{0.5V}=4P$ So, pressure becomes 4 times.