Total heat supplied at constant volume is

A

$$Q = m \times C_p \times (T_2 - T_1)$$

B

$$Q = m \times R \times (T_2 - T_1)$$

C

$$Q = mC_v \times (T_2 + T_1)$$

D

$$Q = mC_v \times (T_2 - T_1)$$