Resistor getting hot - up to 50°C. Is it an issue of the resistor wattage or nature of the resistor?
Any 1k resistor will have to dissipate the 118 milliwatts. The resistor rated wattage just tells if the resistor can handle it or not. If all else remains the same, they all will end up at the same temperature. As resistors that can handle more power are larger and contain more mass, they just take longer to reach that temperature. To reduce the temperature, the heat needs to be conducted away from the resistor via PCB or airflow.