$1.0$ mol of a monatomic gas is warmed from $300\ \text{K}$ to $500\ \text{K}$ at a steady volume, then from $500\ \text{K}$ to $700\ \text{K}$ at a steady pressure. How much heat does it take in altogether? ($R = 8.31\ \text{J mol}^{-1}\text{K}^{-1}$.)